AMS Performance Street Downpipe with GESI Catalytic Converter for 2020-2021 Toyota GR Supra (AMS.38.05.0001-2)

Fits 2020-2021 Toyota GR Supra (A91 Edition, Base, Launch Edition, and Premium models).

Maximize the exhaust efficiency of your B58-powered A90 with the AMS Performance Street Downpipe. This system is designed to reduce back pressure and significantly improve turbo spool-up by replacing the restrictive factory unit with a high-flow mandrel-bent design. The long, gradual transitions within the pipe section allow exhaust gases to maintain high velocity, facilitating faster power delivery across the RPM range.

At the core of this downpipe is a GESI catalytic converter featuring a proprietary substrate and wash formulated specifically for modern vehicle emissions requirements. This is not a generic, off-the-shelf component; it is engineered to handle the increased heat and flow of performance-tuned applications while maintaining a street-friendly configuration.

• Replaces restrictive factory downpipe with a high-flow mandrel-bent design
• Includes a vehicle-specific GESI catalytic converter with specialized substrate
• Reduces back pressure for improved turbocharger response and spool-up
• Engineered with gradual transitions to maintain exhaust gas velocity
• Manufacturer Part Number: AMS.38.05.0001-2