HKS Dry Carbon Cold Air Intake Box - 2020-2026 Toyota A90 Supra

Dry Carbon Cold Air Intake Box for the 2020-2026 GR Supra

The HKS Dry Carbon Cold Air Intake Box for the 2020-2021 Toyota GR Supra replaces the factory plastic airbox with a dry carbon fiber unit that reduces weight and improves thermal management. The dry carbon material is a poor conductor of heat. It does not absorb and transfer engine bay heat to the intake air the way plastic can. Combined with the cold air routing, the carbon airbox keeps intake charge temperatures lower than the factory setup across a wider range of operating conditions.

Specs & Highlights

• Dry carbon fiber airbox construction
• Reduces intake charge temperature versus OEM plastic
• Cold air intake routing
• Lightweight versus factory airbox
• Works with HKS SSQV4 and other intake accessories
• Fitment: 2020-2026 Toyota GR Supra (A90)

8-Liter Volume, 0.9 kg vs 1.8 kg OEM

The dry carbon airbox body is formed at 1.5mm nominal wall thickness using 2×2 twill pre-preg CF, providing a rigid box that does not flex under underhood pressure differentials. Total box volume is approximately 8 liters, larger than the factory airbox at approximately 6 liters, which reduces induction noise resonance at certain RPM frequencies while improving filter access. Weight is approximately 0.9 kg versus the OEM plastic airbox at approximately 1.8 kg, a saving of approximately 0.9 kg for a carbon piece at a significantly higher material cost.

Carbon Thermal Properties vs Plastic

The airbox is the thermal management component in the intake system. A well-designed airbox isolates the filter from hot underhood air and manages where the intake pickup is positioned relative to heat sources. The HKS dry carbon box improves on the factory design in both respects. The material properties of dry carbon fiber provide better thermal isolation than ABS plastic, and the cold air routing positions the intake away from the primary heat sources in the B58 engine bay.

Dry Carbon Box Is the Middle Step Between Filter Swap and Full CAI

This box is the 2020-2021 specific fitment. The design and packaging differs from the 2022+ intake application due to differences in the B58 engine installation between the A90 variants. Dry carbon construction means the box holds its shape under the underhood vibration and pressure that can deform plastic alternatives over time.

The FT Breakdown

The dry carbon intake box is the thermal and material upgrade step between the Super Air Filter (filter swap only) and the full DryCarbon Cold Air Intake Kit (AT001, complete system replacement). It is the right choice for builds that want the thermal management improvement and the carbon material quality without committing to a complete intake system change. The 8-liter volume of the dry carbon airbox versus 6 liters OEM is not incidental — more box volume means less resonance at the specific RPM frequencies where the FA20 airbox produces induction noise. The A90 Supra airbox has a known resonance at partial throttle that the larger HKS box attenuates, so the thermal improvement comes with an acoustic improvement that most owners notice on the first drive.