{"product_id":"active-autowerke-bmw-exhaust-stubbies-for-e9x-m3-pekz1e","title":"Active Autowerke BMW Exhaust Stubbies for E9X M3","description":"\u003cmain id=\"content\" class=\"content product-page\" role=\"main\"\u003e\u003cmain id=\"content\" class=\"content product-page\" role=\"main\"\u003e\u003cwlm class=\"wlm-content\"\u003e\u003cdiv id=\"shopify-section-template--18177512702232__description\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__description\" data-section-type=\"tabbed\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.tabbed.js?v=83467205078527531921678406186\" data-carousel-type=\"section\" class=\"container clearfix loaded ignore\"\u003e\u003cdiv class=\"nine center text-left bottompad clearfix\"\u003e\u003cdiv id=\"description\" class=\"product-desc tab-body tab-body-content tab-body-id-template--18177512702232__description\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"tab-description\"\u003e\u003cdiv class=\"tabindex\"\u003e\n\u003cp\u003eThe Active Autowerke N52 Performance Exhaust Header is specifically designed for BMW chassis which utilize the N52 inline 6-cylinder engine. With our performance header for the N52, you will be able to increase the exhaust flow of your BMW while gaining additional power u2013 something that is difficult to accomplish on these vehicles.\u003c\/p\u003e\n\u003cp\u003eThis header was engineered to promote optimum flow and eliminate any restrictions that could possibly rob the engine of extra horsepower. Available for a number of BMW applications, the Active Autowerke N52 Performance Exhaust Header should be one of the first upgrades owners elect to make. Not to mention, the tremendous effects can be felt almost immediately.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDyno-Proven 20+ WHP gains over stock manifold\u003c\/li\u003e\n\u003cli\u003eImproved power \u0026amp; torque curves throughout entire RPM range\u003c\/li\u003e\n\u003cli\u003eAvailable for Coupe, Convertible, \u0026amp; Sedan\u003c\/li\u003e\n\u003cli\u003eDesigned for RACE and\/or TRACK USE\u003c\/li\u003e\n\u003cli\u003e100% 304 Brushed Stainless Steel finish\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing for a smooth \u0026amp; unrestricted flow\u003c\/li\u003e\n\u003cli\u003eEach header test fitted on N52 Header jig\u003c\/li\u003e\n\u003cli\u003eGuaranteed to fit on BMW E9X 328i w\/N52 engine\u003c\/li\u003e\n\u003cli\u003eIncludes all gaskets needed for installation ( $150 SAVINGS )\u003c\/li\u003e\n\u003cli\u003eTwo-year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003ch3\u003eN52 EXHAUST HEADER APPLICATIONS:\u003c\/h3\u003e\n\u003ch3\u003eE82:\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e128i Coupe or Convertible\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eE9X:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e325i\/325xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e328i\/328xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e330i\/330xi Sedan, Couple, or Convertible\u003c\/li\u003e\n\u003cli\u003eWILL NOT FIT RHD CARS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke N52 Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3 Stage intake manifold (charcoal air filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eK\u0026amp;N Drop-in filteru00a0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/p\u003e- Header system designed for off-road use and racing application only\u003cbr\u003e- Will generate **CEL** without\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/store.activeautowerke.com\/collections\/e9x-328\/products\/active-autowerke-bmw-e9x-328i-bmw-128i-n51-n52-performance-tune-software\" title=\"Active Autowerke N52 Software Tune Upgrade\" target=\"_blank\"\u003eActive Autowerke N52 software upgrade\u003c\/a\u003e\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003eMustang Dyno Results - BMW 328i Auto:\u003c\/h2\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/Dyno-N52Headers.jpg?1673\"\u003e\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003eu00a0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003eu00a0\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock intake manifold (charcoal filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOEM paper air intake filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRESULTS:u00a0\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBottom line - stock 328i Automatic: u00a0\u003cem\u003e175 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e161 WTQ\u003c\/em\u003e\u003cbr\u003eMiddle line - AA Header \u0026amp; charcoal filter delete: u00a0\u003cem\u003e198 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cem\u003e179 WTQ\u003c\/em\u003e\u003cbr\u003eTop line - AA header, AA software, \u0026amp; charcoal filter delete: u00a0\u003cem\u003e\u003cstrong\u003e207 WHP\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003e192 WTQ\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eu00a0u00a0\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cb\u003eCreated With Performance In Mind\u003c\/b\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAs is the goal with building any header, the purpose of designing the N52 Performance Header was increase horsepower and improve overall performance. Our header does a tremendous job of freeing up untapped horsepower that the BMW N52 is capable of producing. After many dyno runs and recorded results, the data validates the Active Autowerke N52 Performance Header as must-have BMW performance part for a noticeable and powerful upgrade.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eMaterial \u0026amp; Durability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for either naturally aspirated or supercharged applications, the N52 Header by Active Autowerke is made entirely of 100% 304 stainless steel. With this header, worrying about durability is a thing of the past.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eIs installing the header difficult to do? Not at all! Robust exhaust flanges with recessed mounting holes make the installation of your N52 Performance Header a breeze. With a few quick turns of a ratchet, you will be well on your way to feeling the additional horsepower.\u003c\/p\u003e\n\u003cstrong\u003e\u003cem\u003eNOTE:u00a0Active Autowerke GUARANTEES that each and every N52 Performance Header will be a precise fit. Every Active Autowerke N52 Header is test-fitted on our N52 motor jig as part of our quality control.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eHardware:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs far as mounting hardware is concerned, this system is absolutely complete. The BMW N52 engine uses a single-use oval shape gasket to help seal the exhaust manifold against the exhaust port u2013 a floating design that also self-centers the exhaust flange as it is being torqued. Reuse of this gasket is NOT SUGGESTED which is why we provide you with SIX new gaskets as part of the installation hardware.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAlso included are two fiber gaskets for where the header meets the remaining sections of the exhaust system. Copper locking nuts for the header to mount against the cylinder head and mounting bolts w\/nuts to secure the header to the exhaust system are included as well.u00a0\u003c\/p\u003e\n\u003cem\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/em\u003eu00a0\u003cstrong\u003e\u003cem\u003eThe factory exhaust catalysts MUST be removed in the process, making this solution recommended for off-road and racing applications ONLY.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003eThere will be a CEL without Active Autowerke software upgrade\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__apps\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__apps\" class=\"container clearfix loaded\"\u003e\u003cdiv class=\"twelve bottompad\"\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__related\" class=\"shopify-section\"\u003e\u003cdiv class=\"clearfix\"\u003e\u003cdiv id=\"related\" class=\"container clearfix\"\u003e\u003csection data-section-id=\"template--18177512702232__related\" data-product-id=\"406574543\" data-id=\"related\" data-address=\"\/recommendations\/products?section_id=template--18177512702232__related\u0026amp;product_id=406574543\u0026amp;limit=4\u0026amp;intent=complementary\" data-section-type=\"product_recommendations\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.product.recommendations.js?v=102393478811733886461678406186\" data-carousel-type=\"section\" class=\"twelve product-recommendations relative loaded ignore\"\u003e\u003c\/section\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__pagination\" class=\"shopify-section\"\u003e\u003c\/div\u003e\u003c\/wlm\u003e\u003c\/main\u003e\n\u003cdiv id=\"shopify-section-footer-brands\" class=\"shopify-section\"\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-footer\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"footer\" data-section-type=\"footer\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.footer.js?v=99714854018320942351678406186\" data-multi=\"true\" class=\"clearfix loaded ignore\"\u003e\n\u003cdiv class=\"cbb-frequently-bought-container cbb-desktop-view\"\u003e\n\u003cmain id=\"content\" class=\"content product-page\" role=\"main\"\u003e\u003cwlm class=\"wlm-content\"\u003e\u003cdiv id=\"shopify-section-template--18177512702232__description\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__description\" data-section-type=\"tabbed\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.tabbed.js?v=83467205078527531921678406186\" data-carousel-type=\"section\" class=\"container clearfix loaded ignore\"\u003e\u003cdiv class=\"nine center text-left bottompad clearfix\"\u003e\u003cdiv id=\"description\" class=\"product-desc tab-body tab-body-content tab-body-id-template--18177512702232__description\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"tab-description\"\u003e\u003cdiv class=\"tabindex\"\u003e\n\u003cp\u003eThe Active Autowerke N52 Performance Exhaust Header is specifically designed for BMW chassis which utilize the N52 inline 6-cylinder engine. With our performance header for the N52, you will be able to increase the exhaust flow of your BMW while gaining additional power u2013 something that is difficult to accomplish on these vehicles.\u003c\/p\u003e\n\u003cp\u003eThis header was engineered to promote optimum flow and eliminate any restrictions that could possibly rob the engine of extra horsepower. Available for a number of BMW applications, the Active Autowerke N52 Performance Exhaust Header should be one of the first upgrades owners elect to make. Not to mention, the tremendous effects can be felt almost immediately.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDyno-Proven 20+ WHP gains over stock manifold\u003c\/li\u003e\n\u003cli\u003eImproved power \u0026amp; torque curves throughout entire RPM range\u003c\/li\u003e\n\u003cli\u003eAvailable for Coupe, Convertible, \u0026amp; Sedan\u003c\/li\u003e\n\u003cli\u003eDesigned for RACE and\/or TRACK USE\u003c\/li\u003e\n\u003cli\u003e100% 304 Brushed Stainless Steel finish\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing for a smooth \u0026amp; unrestricted flow\u003c\/li\u003e\n\u003cli\u003eEach header test fitted on N52 Header jig\u003c\/li\u003e\n\u003cli\u003eGuaranteed to fit on BMW E9X 328i w\/N52 engine\u003c\/li\u003e\n\u003cli\u003eIncludes all gaskets needed for installation ( $150 SAVINGS )\u003c\/li\u003e\n\u003cli\u003eTwo-year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003ch3\u003eN52 EXHAUST HEADER APPLICATIONS:\u003c\/h3\u003e\n\u003ch3\u003eE82:\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e128i Coupe or Convertible\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eE9X:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e325i\/325xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e328i\/328xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e330i\/330xi Sedan, Couple, or Convertible\u003c\/li\u003e\n\u003cli\u003eWILL NOT FIT RHD CARS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke N52 Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3 Stage intake manifold (charcoal air filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eK\u0026amp;N Drop-in filteru00a0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/p\u003e- Header system designed for off-road use and racing application only\u003cbr\u003e- Will generate **CEL** without\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/store.activeautowerke.com\/collections\/e9x-328\/products\/active-autowerke-bmw-e9x-328i-bmw-128i-n51-n52-performance-tune-software\" title=\"Active Autowerke N52 Software Tune Upgrade\" target=\"_blank\"\u003eActive Autowerke N52 software upgrade\u003c\/a\u003e\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003eMustang Dyno Results - BMW 328i Auto:\u003c\/h2\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/Dyno-N52Headers.jpg?1673\"\u003e\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003eu00a0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003eu00a0\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock intake manifold (charcoal filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOEM paper air intake filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRESULTS:u00a0\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBottom line - stock 328i Automatic: u00a0\u003cem\u003e175 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e161 WTQ\u003c\/em\u003e\u003cbr\u003eMiddle line - AA Header \u0026amp; charcoal filter delete: u00a0\u003cem\u003e198 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cem\u003e179 WTQ\u003c\/em\u003e\u003cbr\u003eTop line - AA header, AA software, \u0026amp; charcoal filter delete: u00a0\u003cem\u003e\u003cstrong\u003e207 WHP\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003e192 WTQ\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eu00a0u00a0\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cb\u003eCreated With Performance In Mind\u003c\/b\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAs is the goal with building any header, the purpose of designing the N52 Performance Header was increase horsepower and improve overall performance. Our header does a tremendous job of freeing up untapped horsepower that the BMW N52 is capable of producing. After many dyno runs and recorded results, the data validates the Active Autowerke N52 Performance Header as must-have BMW performance part for a noticeable and powerful upgrade.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eMaterial \u0026amp; Durability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for either naturally aspirated or supercharged applications, the N52 Header by Active Autowerke is made entirely of 100% 304 stainless steel. With this header, worrying about durability is a thing of the past.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eIs installing the header difficult to do? Not at all! Robust exhaust flanges with recessed mounting holes make the installation of your N52 Performance Header a breeze. With a few quick turns of a ratchet, you will be well on your way to feeling the additional horsepower.\u003c\/p\u003e\n\u003cstrong\u003e\u003cem\u003eNOTE:u00a0Active Autowerke GUARANTEES that each and every N52 Performance Header will be a precise fit. Every Active Autowerke N52 Header is test-fitted on our N52 motor jig as part of our quality control.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eHardware:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs far as mounting hardware is concerned, this system is absolutely complete. The BMW N52 engine uses a single-use oval shape gasket to help seal the exhaust manifold against the exhaust port u2013 a floating design that also self-centers the exhaust flange as it is being torqued. Reuse of this gasket is NOT SUGGESTED which is why we provide you with SIX new gaskets as part of the installation hardware.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAlso included are two fiber gaskets for where the header meets the remaining sections of the exhaust system. Copper locking nuts for the header to mount against the cylinder head and mounting bolts w\/nuts to secure the header to the exhaust system are included as well.u00a0\u003c\/p\u003e\n\u003cem\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/em\u003eu00a0\u003cstrong\u003e\u003cem\u003eThe factory exhaust catalysts MUST be removed in the process, making this solution recommended for off-road and racing applications ONLY.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003eThere will be a CEL without Active Autowerke software upgrade\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__apps\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__apps\" class=\"container clearfix loaded\"\u003e\u003cdiv class=\"twelve bottompad\"\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__related\" class=\"shopify-section\"\u003e\u003cdiv class=\"clearfix\"\u003e\u003cdiv id=\"related\" class=\"container clearfix\"\u003e\u003csection data-section-id=\"template--18177512702232__related\" data-product-id=\"406574543\" data-id=\"related\" data-address=\"\/recommendations\/products?section_id=template--18177512702232__related\u0026amp;product_id=406574543\u0026amp;limit=4\u0026amp;intent=complementary\" data-section-type=\"product_recommendations\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.product.recommendations.js?v=102393478811733886461678406186\" data-carousel-type=\"section\" class=\"twelve product-recommendations relative loaded ignore\"\u003e\u003c\/section\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__pagination\" class=\"shopify-section\"\u003e\u003c\/div\u003e\u003c\/wlm\u003e\u003c\/main\u003e\n\u003cdiv id=\"shopify-section-footer-brands\" class=\"shopify-section\"\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-footer\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"footer\" data-section-type=\"footer\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.footer.js?v=99714854018320942351678406186\" data-multi=\"true\" class=\"clearfix loaded ignore\"\u003e\n\u003cdiv class=\"cbb-frequently-bought-container cbb-desktop-view\"\u003e\n\u003cmain id=\"content\" class=\"content product-page\" role=\"main\"\u003e\u003cwlm class=\"wlm-content\"\u003e\u003cdiv id=\"shopify-section-template--18177512702232__description\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__description\" data-section-type=\"tabbed\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.tabbed.js?v=83467205078527531921678406186\" data-carousel-type=\"section\" class=\"container clearfix loaded ignore\"\u003e\u003cdiv class=\"nine center text-left bottompad clearfix\"\u003e\u003cdiv id=\"description\" class=\"product-desc tab-body tab-body-content tab-body-id-template--18177512702232__description\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"tab-description\"\u003e\u003cdiv class=\"tabindex\"\u003e\n\u003cp\u003eThe Active Autowerke N52 Performance Exhaust Header is specifically designed for BMW chassis which utilize the N52 inline 6-cylinder engine. With our performance header for the N52, you will be able to increase the exhaust flow of your BMW while gaining additional power u2013 something that is difficult to accomplish on these vehicles.\u003c\/p\u003e\n\u003cp\u003eThis header was engineered to promote optimum flow and eliminate any restrictions that could possibly rob the engine of extra horsepower. Available for a number of BMW applications, the Active Autowerke N52 Performance Exhaust Header should be one of the first upgrades owners elect to make. Not to mention, the tremendous effects can be felt almost immediately.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDyno-Proven 20+ WHP gains over stock manifold\u003c\/li\u003e\n\u003cli\u003eImproved power \u0026amp; torque curves throughout entire RPM range\u003c\/li\u003e\n\u003cli\u003eAvailable for Coupe, Convertible, \u0026amp; Sedan\u003c\/li\u003e\n\u003cli\u003eDesigned for RACE and\/or TRACK USE\u003c\/li\u003e\n\u003cli\u003e100% 304 Brushed Stainless Steel finish\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing for a smooth \u0026amp; unrestricted flow\u003c\/li\u003e\n\u003cli\u003eEach header test fitted on N52 Header jig\u003c\/li\u003e\n\u003cli\u003eGuaranteed to fit on BMW E9X 328i w\/N52 engine\u003c\/li\u003e\n\u003cli\u003eIncludes all gaskets needed for installation ( $150 SAVINGS )\u003c\/li\u003e\n\u003cli\u003eTwo-year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003ch3\u003eN52 EXHAUST HEADER APPLICATIONS:\u003c\/h3\u003e\n\u003ch3\u003eE82:\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e128i Coupe or Convertible\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eE9X:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e325i\/325xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e328i\/328xi Sedan, Coupe, or Convertible\u003c\/li\u003e\n\u003cli\u003e330i\/330xi Sedan, Couple, or Convertible\u003c\/li\u003e\n\u003cli\u003eWILL NOT FIT RHD CARS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke N52 Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3 Stage intake manifold (charcoal air filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eK\u0026amp;N Drop-in filteru00a0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/p\u003e- Header system designed for off-road use and racing application only\u003cbr\u003e- Will generate **CEL** without\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/store.activeautowerke.com\/collections\/e9x-328\/products\/active-autowerke-bmw-e9x-328i-bmw-128i-n51-n52-performance-tune-software\" title=\"Active Autowerke N52 Software Tune Upgrade\" target=\"_blank\"\u003eActive Autowerke N52 software upgrade\u003c\/a\u003e\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003eMustang Dyno Results - BMW 328i Auto:\u003c\/h2\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/Dyno-N52Headers.jpg?1673\"\u003e\u003cbr\u003e\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp\u003eu00a0\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMODIFICATIONS:\u003c\/strong\u003eu00a0\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eActive Autowerke Performance Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock intake manifold (charcoal filter removed)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOEM paper air intake filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStock exhaust (with secondary catalytic converters intact)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRESULTS:u00a0\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBottom line - stock 328i Automatic: u00a0\u003cem\u003e175 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e161 WTQ\u003c\/em\u003e\u003cbr\u003eMiddle line - AA Header \u0026amp; charcoal filter delete: u00a0\u003cem\u003e198 WHP\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cem\u003e179 WTQ\u003c\/em\u003e\u003cbr\u003eTop line - AA header, AA software, \u0026amp; charcoal filter delete: u00a0\u003cem\u003e\u003cstrong\u003e207 WHP\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003e|\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003e192 WTQ\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eu00a0u00a0\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cb\u003eCreated With Performance In Mind\u003c\/b\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAs is the goal with building any header, the purpose of designing the N52 Performance Header was increase horsepower and improve overall performance. Our header does a tremendous job of freeing up untapped horsepower that the BMW N52 is capable of producing. After many dyno runs and recorded results, the data validates the Active Autowerke N52 Performance Header as must-have BMW performance part for a noticeable and powerful upgrade.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eMaterial \u0026amp; Durability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for either naturally aspirated or supercharged applications, the N52 Header by Active Autowerke is made entirely of 100% 304 stainless steel. With this header, worrying about durability is a thing of the past.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eIs installing the header difficult to do? Not at all! Robust exhaust flanges with recessed mounting holes make the installation of your N52 Performance Header a breeze. With a few quick turns of a ratchet, you will be well on your way to feeling the additional horsepower.\u003c\/p\u003e\n\u003cstrong\u003e\u003cem\u003eNOTE:u00a0Active Autowerke GUARANTEES that each and every N52 Performance Header will be a precise fit. Every Active Autowerke N52 Header is test-fitted on our N52 motor jig as part of our quality control.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003eHardware:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs far as mounting hardware is concerned, this system is absolutely complete. The BMW N52 engine uses a single-use oval shape gasket to help seal the exhaust manifold against the exhaust port u2013 a floating design that also self-centers the exhaust flange as it is being torqued. Reuse of this gasket is NOT SUGGESTED which is why we provide you with SIX new gaskets as part of the installation hardware.\u003c\/p\u003e\n\u003cp aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003eAlso included are two fiber gaskets for where the header meets the remaining sections of the exhaust system. Copper locking nuts for the header to mount against the cylinder head and mounting bolts w\/nuts to secure the header to the exhaust system are included as well.u00a0\u003c\/p\u003e\n\u003cem\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003c\/em\u003eu00a0\u003cstrong\u003e\u003cem\u003eThe factory exhaust catalysts MUST be removed in the process, making this solution recommended for off-road and racing applications ONLY.\u003c\/em\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv aria-setsize=\"0\" aria-posinset=\"0\" aria-level=\"0\"\u003e\u003cstrong\u003e\u003cem\u003eThere will be a CEL without Active Autowerke software upgrade\u003c\/em\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__apps\" class=\"shopify-section\"\u003e\u003csection data-section-id=\"template--18177512702232__apps\" class=\"container clearfix loaded\"\u003e\u003cdiv class=\"twelve bottompad\"\u003e\u003c\/div\u003e\u003c\/section\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__related\" class=\"shopify-section\"\u003e\u003cdiv class=\"clearfix\"\u003e\u003cdiv id=\"related\" class=\"container clearfix\"\u003e\u003csection data-section-id=\"template--18177512702232__related\" data-product-id=\"406574543\" data-id=\"related\" data-address=\"\/recommendations\/products?section_id=template--18177512702232__related\u0026amp;product_id=406574543\u0026amp;limit=4\u0026amp;intent=complementary\" data-section-type=\"product_recommendations\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.product.recommendations.js?v=102393478811733886461678406186\" data-carousel-type=\"section\" class=\"twelve product-recommendations relative loaded ignore\"\u003e\u003c\/section\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--18177512702232__pagination\" class=\"shopify-section\"\u003e\u003c\/div\u003e\u003c\/wlm\u003e\u003c\/main\u003e\n\u003cdiv id=\"shopify-section-footer-brands\" class=\"shopify-section\"\u003e\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-footer\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"footer\" data-section-type=\"footer\" data-url=\"\/\/store.activeautowerke.com\/cdn\/shop\/t\/23\/assets\/script.footer.js?v=99714854018320942351678406186\" data-multi=\"true\" class=\"clearfix loaded ignore\"\u003e\n\u003cdiv\u003eYou already own the Active Autowerke Signature Series X pipe for your BMW E9x M3 to achieve the maximum in performance and power, but were limited only to the race track since it replaces the BMW factory exhaust catalysts and was not intended for the highways.\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eActive Autowerke Stubbies\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis designed primarily as a cost effective means of utilizing your existing BMW Factory catalysts into something usable.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eIf this can be done, then there is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e...No need to purchase as set of catalysts to be OBD11 readiness compliant...\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003eThe Active Autowerke Stubbies with your BMW catalysts will do the task of meeting OBD11 readiness requirements when installed with the Active Autowerke X-PIPE. Of course, the feature of the added performance is still maintained.\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003eYou will find that the front section of the Active Signature X pipe is totally removable by the use of V-Band clamps. Simply remove this front section and replace with the BMW primary catalysts that are converted with the Active Stubbies.\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003eWhat the Active Autowerke Stubbies have accomplished is to transform you existing BMW primary exhaust catalysts into a smaller, more compact unit that has added features. Just by cutting with a sawzall and welding by someone competent, you will have a re-sized BMW factory catalyst in a much smaller package. Now you can run the Active Signature X pipe on the street or the race circuit and all it takes is switching your front pipe sections to suit your surface conditions. This can be done repeatedly in multiple re-installs since there are no gaskets to replace.\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0578\/5357\/files\/stubby-1_medium.jpg?1183\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eFactory Cats with Stubbies Installed (Factory Cats Not Included With Stubbies)\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003eAs a added BONUS. Your original catalysts can now be stored easily in a smaller, more modular package.\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMeet OB11 readiness compliance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eVery cost effective. $295.00 for the SET (sold as a PAIR)\u003c\/li\u003e\n\u003cli\u003eSmall and compact package\u003c\/li\u003e\n\u003cli\u003eMultiple re-installs w\/o the need for additional gasket\u003c\/li\u003e\n\u003cli\u003eModular for both Track and Street application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/main\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":52626988597528,"sku":"11-020","price":679.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0998\/4514\/4856\/files\/kies-motorsports-active-autowerke-active-autowerke-bmw-exhaust-stubbies-for-e9x-m3-1183882120.webp?v=1788774766","url":"https:\/\/driveforges.com\/products\/active-autowerke-bmw-exhaust-stubbies-for-e9x-m3-pekz1e","provider":"Drive Forge","version":"1.0","type":"link"}