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AMS Performance Street Downpipe w/ GESI Catalytic Converter for Toyota GR Supra A90/A91 – High Flow Performance Exhaust Upgrade
Unlock maximum performance, improved turbo spool, and increased power with the AMS Performance Street Downpipe for the Toyota GR Supra A90/A91 (MK5). Featuring a 4.5” mandrel-bent stainless steel design, this high-flow downpipe significantly reduces back pressure, allowing exhaust gases to flow smoothly for faster turbo spool and increased horsepower.
Equipped with a 49-state legal GESI catalytic converter rated for 800+ HP, this downpipe enhances exhaust flow while maintaining emissions compliance. Designed with CAD-engineered precision, it provides a throaty exhaust note under acceleration while offering seamless fitment to both stock and aftermarket exhaust systems.
This bolt-on upgrade is an essential mod for Supra enthusiasts looking to enhance power, efficiency, and exhaust sound without sacrificing drivability.
Key Features & Benefits:
| Feature | Benefit |
|---|---|
| Maximized Turbo Spool & Power Gains | Lower back pressure enables exhaust gases to flow freely, reducing turbo lag and increasing peak performance. |
| 49-State Legal High-Flow GESI Catalytic Converter | Rated for 800+ HP, ensuring compliance with emissions regulations while improving performance. |
| Premium 304 Stainless Steel Construction | 4.5” mandrel-bent tubing with a smooth turbine flange transition for maximized volume & flow. |
| Stock & Aftermarket Exhaust Compatibility | Features a 3.15” (80mm) outlet, allowing fitment with OEM or aftermarket cat-back exhaust systems. |
| OEM Fitment with No Modifications Required | Bolt-on installation with OEM O2 sensor locations—no jumpers or additional wiring needed. |
| Enhanced Exhaust Sound | Produces a deep, aggressive exhaust note under acceleration while maintaining smooth, refined operation. |
| Durable & Heat-Resistant Design | Optimized for long-lasting durability with a flex section that enhances resistance to thermal expansion. |
| Designed for RHD & LHD GR Supra Models | Engineered for perfect fitment on both right-hand drive and left-hand drive GR Supra A90/A91 models. |
Vehicle Fitment:
✔ Toyota GR Supra A90/A91 (MK5) – B58 3.0L Turbo Engine
✔ Model Years: 2020, 2021, 2022, 2023, 2024
✔ Compatible with stock & aftermarket cat-back exhaust systems
What’s Included?
✅ AMS Performance 4.5” Stainless Steel Downpipe
✅ 49-State Legal GESI Catalytic Converter (Rated for 800+ HP)
✅ OEM-Compatible O2 Sensor Ports (Pre-installed for plug-and-play fitment)
✅ High-Flow Flex Section for Durability & Heat Expansion
✅ Complete Installation Hardware & Clamps
Important Notes:
⚠️ International Shipping – This product ships from our global distribution facility.
⚠️ Professional Installation Recommended – While designed for OEM bolt-on fitment, installation by an experienced technician is advised.
⚠️ Not Legal for Sale or Use in California – Please check local emissions regulations before installation.
Why Choose Sequential Racing’s AMS Performance Street Downpipe?
At Sequential Racing Australia, we bring you premium performance upgrades for the Toyota GR Supra A90/A91, ensuring you unlock the full potential of your B58 engine. The AMS Performance Street Downpipe is engineered for maximum flow, emissions compliance, and an aggressive exhaust note.
🔴 Upgrade your GR Supra’s exhaust system today! Order now from Sequential Racing!
Made to Order: For made to order items, production and delivery may take up to 2-3 weeks before dispatch.
Pre-Order: For pre-order items, estimated dipsatch will be listed on the product page. Due to additional logistics steps, they will require x days before dispatching. Timings will be clearly indicated so you know what to expect before purchasing.
Order Updates: Our dedicated team will provide guidance and regular updates once your purchase is confirmed.
Professional Installation: For the best results and a precise fit, we recommend professional installation. Please email support@sequentialracing.com.au for installation.
Mechanical Knowledge: DIY Basic mechanical skills are recommended for installation.
Vehicle Modifications: As with all engineered aftermarket parts, minor adjustments—such as trimming, sanding, or modifying—may be required. This is due to manufacturing variances and natural wear over time.
Aftermarket Parts: Most products, including carbon components, are aftermarket parts designed for vehicle modifications. While they are made to fit specific vehicles, slight variations may occur due to manufacturing differences.
Fitment Verification: Upon receiving your item, please verify that you have received the correct part. We strongly recommend performing a test fit before painting or undertaking any permanent installation.
Returns & Warranty: Returns or warranty claims will not be accepted if the product has been tampered with, installed, or is not in its original, new condition.
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