HKS Hi-Power Spec-L2 Single Exhaust - 2013-2021 Subaru BRZ /Scion FR-S/ Toyota 86

HKS Hi-Power Spec-L2 Single Exhaust for the 2013-2021 Subaru BRZ / Scion FR-S / Toyota 86

The HKS Hi-Power Spec-L2 Single Exhaust for the 2013-2021 Subaru BRZ / Scion FR-S / Toyota 86 is a single exit SPEC-L2 for the FA20 first-gen platform. The Hi-Power SPEC-L2 muffler design delivers HKS's most refined single-exit exhaust character for the platform. Improved mid-range response, defined exhaust note under load, appropriate sound level for street use.

Specs & Highlights

• Cat-back exhaust system
• Hi-Power SPEC-L2 muffler tuning
• Single exit configuration
• Stainless steel construction
• Fitment: 2013-2021 Subaru BRZ / Scion FR-S / Toyota 86

50.8mm Pipe, 93 dB(A), First-Generation FA20 Routing

The AT131 single-exit SPEC-L2 for the 2013-2021 FA20 chassis uses the 50.8mm pipe diameter and 115mm tip specification of the AT123 but with revised hanger positions and mid-pipe routing optimized for the first-generation FA20 underbody layout. Sound level is identical to the AT123 at approximately 93 dB(A) at 1m at WOT. System weight is approximately 7.6 kg. Where the AT123 covers both FA20 and FA24 platforms, the AT131 is the dedicated first-generation application when a platform-specific part is required.

FA20 Dedicated Application vs the AT123 Multi-Platform SKU

The SPEC-L2 designation represents HKS's refined evolution of the SPEC-L, with revised internal geometry for improved mid-range exhaust pulse and more consistent sound character across the RPM range. Installation is a direct cat-back bolt-on using OEM flange connections and hangers.

Same SPEC-L2 Sound and Flow, Platform-Specific Routing

Verify the correct part number for your chassis generation. The AT131 is for FA20 first-generation applications; the AT130 is for FA24 second-generation applications. The exhaust routing and geometry differ between generations.

The FT Breakdown

The HKS SPEC-L2 is the benchmark single-exit exhaust for the FT86 and GR86 platform family. Whether you are on the first or second generation, the SPEC-L2 provides the right balance of sound, performance improvement, and daily drivability. The AT131's platform-specific routing for the first-generation FA20 underbody is the detail that makes it worth distinguishing from the AT123 multi-platform SKU. When HKS routes an exhaust system to a specific chassis, the hanger positions, ground clearance, and heat shield proximity are calibrated for that underbody — the AT131 sits and hangs correctly on the first-generation car in a way that matters when you are driving on real roads with real speed bumps.