• AMS Performance street downpipe with GESI cat for GR Supra A90/A91
  • AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91 – view 2
  • AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91 – view 3
  • AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91 – view 4
  • AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91 – view 5

AMS Performance

AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91

AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91

amsAMS.38.05.0001-2

$2,322.00
$2,322.00
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Installation Difficulty

Unlock maximum performance, improved turbo spool, and a deeper exhaust tone with the AMS Performance Street Downpipe for the Toyota GR Supra A90/A91 (MK5). Constructed from mandrel-bent 4.5” 304 stainless steel, this downpipe significantly reduces back pressure to improve turbo response, boost power, and enhance overall drivability.

Equipped with a GESI 49-state legal high-flow catalytic converter rated for 800+ HP, this downpipe delivers increased exhaust flow while maintaining emissions compliance outside of California. The CAD-engineered design ensures precise fitment and compatibility with both OEM and aftermarket cat-back exhaust systems—making it a must-have upgrade for daily-driven or modified GR Supras.

Key Features & Benefits:
• Maximized turbo spool & power gains – Reduces back pressure
• 49-state legal GESI catalytic converter – Rated for 800+ HP with emissions-friendly performance
• 4.5” mandrel-bent 304 stainless steel – Smooth transitions 
• OEM & aftermarket exhaust compatible – 3.15” (80mm) outlet fits stock 
• Plug-and-play O2 sensor ports – OEM-style sensor location, no wiring jumpers needed
• Deep, refined exhaust tone – Aggressive sound under throttle without harshness
• Heat-resistant flex section – Allows for thermal expansion
• RHD & LHD compatible – Engineered for perfect global fitment

Vehicle Fitment:
• Toyota GR Supra A90/A91 (MK5) – B58 3.0L Turbo
• Model Years: 2020, 2021, 2022, 2023, 2024
• Compatible with stock and aftermarket exhausts

What’s Included:
• AMS Performance 4.5” Stainless Steel Downpipe
• 49-State Legal GESI Catalytic Converter (800+ HP rated)
• Pre-installed O2 sensor ports
• Flex section
• Installation hardware and clamps

Order Lead Times

Made to Order: For made to order items, production and delivery may take up to 2-8 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.

Installation and Fitment

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.

Important Information

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: Change-of-mind returns can't be accepted once a product has been installed, modified or used. This doesn't affect your rights under the Australian Consumer Law if an item is faulty – see our Returns, Refunds & Warranty policy.
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AMS Performance Street Downpipe w/ GESI Catalytic Converter for GR Supra A90/A91

$2,322.00

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