Wagner Tuning Stainless Steel Downpipe Kit (US Model) – 2020+ Toyota GR Supra A90

The Wagner Tuning Stainless Steel Downpipe Kit (US Model) for the 2020+ Toyota GR Supra A90 is engineered to significantly improve exhaust flow, reduce backpressure, and unlock faster turbo response from the factory B58 engine. The restrictive OEM catalytic section limits spool, chokes midrange torque, and adds unnecessary heat to the turbocharger. Wagner’s precision-built downpipe solves this with a freer-flowing, motorsport-grade stainless steel construction that delivers both performance and durability.

Manufactured from mandrel-bent T304 stainless steel, the Wagner downpipe features a smooth, uninterrupted flow path designed to maintain exhaust velocity and reduce turbulence. This results in noticeably quicker turbo spool, improved throttle response, and a stronger, more linear powerband throughout the rev range. Whether on factory tuning or an aftermarket calibration, the engine breathes significantly easier with this upgrade.

The CNC-machined flanges, precision welds, and OEM-exact geometry ensure perfect alignment with the turbocharger outlet and factory or aftermarket exhaust systems. Wagner engineered this downpipe specifically for the US-spec A90 Supra, ensuring compatibility with regional sensor layouts, mounting points, and heat shielding.

To manage extreme temperatures, the downpipe incorporates high-grade stainless steel that resists deformation, cracking, and fatigue under repeated high-load cycles. This makes it ideal for tuned vehicles, ethanol blends, and track-driven applications where sustained exhaust heat is common.

As with all Wagner Tuning components, the downpipe undergoes rigorous bench and real-world testing to ensure long-term reliability and consistent performance. The result is a premium bolt-on system that transforms the Supra’s drivability without compromising quality or fitment.

Key Features

• Direct bolt-on for 2020+ Toyota GR Supra A90 (US Model)

• High-flow T304 stainless steel construction

• Reduces backpressure and improves exhaust efficiency

• Faster turbo spool and sharper throttle response

• CNC-machined flanges for perfect OEM alignment

• TIG-welded for maximum durability under high heat

• Compatible with stock and aftermarket exhausts

• Designed to withstand elevated boost and track use

• Lower EGTs and improved turbocharger efficiency

• Developed and validated by Wagner Tuning

Ideal For

• Tuned Supras running higher boost levels

• Drivers seeking a deeper exhaust tone and improved response

• Hybrid/big turbo applications requiring free-flowing exhaust

• Track and spirited driving where heat management matters

• Enthusiasts wanting a premium stainless steel alternative to OEM

Installation

Fully bolt-on and reversible. Uses factory mounting points. Professional installation recommended. A tune may be required depending on regional emissions equipment.