AMS Performance Stainless Steel Street Downpipe – 2020+ Toyota GR Supra A90

The AMS Performance Stainless Steel Street Downpipe for the 2020+ Toyota GR Supra A90 is engineered to deliver improved exhaust flow, quicker turbo response, and a deeper, more refined exhaust tone—all while maintaining OEM-level fitment and reliability. Designed as a direct bolt-on upgrade for the B58 platform, this downpipe dramatically reduces backpressure by replacing the restrictive factory catalytic section with a high-flow stainless steel design built to handle elevated heat and boost.

Constructed from mandrel-bent T304 stainless steel, the AMS downpipe is built to outperform and outlast the OEM part in every measurable way. Precision TIG welds, heavy-duty flanges, and a smooth, uninterrupted internal surface ensure optimal exhaust velocity and durability under repeated thermal cycles. The street version downpipe is specifically designed for improved drivability, consistent performance, and long-term reliability on both stock and tuned vehicles.

By reducing exhaust restriction, the AMS Street Downpipe delivers noticeably faster turbo spool, enhanced throttle response, and improved midrange torque. You'll feel sharper acceleration and a more responsive powerband without introducing drone or harshness. The refined acoustic profile gives the Supra a deeper, more aggressive tone while maintaining street-friendly manners.

AMS engineered this downpipe to integrate seamlessly with the factory exhaust or any aftermarket cat-back system. Every unit is scanned, modeled, and test-fitted to ensure flawless alignment with OEM mounting points and heat shielding. The result is a premium bolt-on solution that installs cleanly and performs consistently whether you’re running a factory ECU map or an aftermarket tune.

Key Features

• Direct bolt-on upgrade for 2020+ Toyota GR Supra A90 (B58)

• High-flow T304 stainless steel construction

• Reduces backpressure and improves turbo response

• Faster spool and stronger midrange acceleration

• Precision TIG welding and OEM-fit flanges

• Deeper, more refined exhaust sound

• Compatible with stock and aftermarket exhaust systems

• Designed for long-term reliability under high heat

• Maintains factory mounting points and heat shielding

• Engineered, tested, and validated by AMS Performance

Ideal For

• Supra owners seeking improved sound and responsiveness

• Tuned or stock vehicles looking for more efficient exhaust flow

• Drivers wanting a premium stainless steel downpipe without harsh noise

• Builds targeting improved spool without sacrificing drivability

Installation

A true bolt-on upgrade using factory mounting points. No cutting or fabrication required. Professional installation recommended for best fitment and performance.