Skip to product information
1 of 2

AMS Performance Toyota GR Supra Street Downpipe w/ GESI Catalytic Converter

AMS.38.05.0001-2



Regular price $1,649.95
Sale price $1,649.95 Regular price $1,649.95
Shipping calculated at checkout.

I have read Axion's store policies on returns, refunds, and cancellations. I also understand that when marked on the product page, special order items may not be canceled for any reason.


  • Fully secure checkout
  • Trusted by thousands
  • Rated and reviewed

FITS: 2020+ Toyota Supra

BEFORE ORDERING:  Does not fit world market vehicles outside of the USDM.

With 20 years of documented research and development in the forced induction field, AMS Performance has proven itself as the powerhouse in the automotive aftermarket. Our award winning performance systems are what all others are measured by. Be the Alpha.

The 4.5″ full mandrel bent downpipe is the best performing and most durable on the market. Power comes in earlier and turbo spool-up is significantly improved. The long gradual transitions within the mandrel bent pipe allows exhaust gasses to maintain velocity without a buildup of back pressure inside of the system. We were able to design a superior product because of our superior engineering. The catalyst has a newly formulated substrate with a specific wash for new vehicle emissions requirements. It is not an off the shelf cat.

  • Significantly Lower Back Pressure Means the Potential for More Power
  • Exhaust Gas Can More Easily Flow Across the Turbine Wheel
  • 49 State Legal High Flow GESI Catalytic Converter Rated to Over 800 Horsepower
  • Newly Formulated Substrate for New Vehicle Emissions Requirements
  • Throaty Exhaust Note Under Wide Open Throttle
  • CAD Engineered for Maximum Exhaust Flow with Unrivaled Fit and Finish
  • 304 Stainless Steel 4.5” Design Reduces to a 3.5” Flex Section, Maximizing Volume and Flow
  • Turbine Flange Offers a Smooth Transition from the Turbine Outlet
  • 3.15” (80mm) Outlet Allows You to Run Either Stock or Aftermarket Catback Systems
  • Complete Bolt on Means No Cutting – Bolts to the Factory Location
  • O2 Sensors in OEM Locations. No Jumpers Needed
  • Mandrel Bent Tubing for the Best Flow

Kit Includes

First in Class Durability and Performance 

AMS is first and foremost an engineering company. The AMS Engineering team utilized Solidworks (3D software) to blueprint the inlet and outlets to optimize exhaust flow. The AMS MKV Supra Downpipe features heavy gauge stainless steel to retain as much heat in the down pipe as possible. Our Engineers 3D printed the downpipe to ensure an OEM level of fitment. Our threaded O2 sensor bungs allow the use of factory O2 sensor. Our downpipes perform better and are not prone to cracking like the alternatives offered by some of the competition. AMS’ Engineering Team produced a product that doesn’t just perform better, they made it sound better too.

CARB And / Or EPA Compliance Testing Not Completed

While we believe this product is either CARB EO exemption applicable, or complies with the EPA's Anti-Tampering Policy, we have not completed the required testing and administrative process at this time. This product is not available to purchase for emissions-controlled vehicles located within the state of California, or available to ship to California addresses, without a completed AMS Race Waiver form. International users outside of the United States should act in accordance with their local laws and regulations.



AMS Performance Toyota GR Supra Street Downpipe w/ GESI Catalytic Converter

$1,649.95

How fast is shipping?

Most orders placed on a weekday before 1pm EST will ship out the same day. Otherwise, it is common for parts to ship in 2-3 days from order date. Please note that both of these exclude special order items, which are clearly marked on product pages.

What is the returns policy?

Most products sold by Axion Industries LLC are covered by our Standard Return Policy and may be returned within 30 days of the original invoice date for a refund. Please note that a restocking fee will apply (see "Refunds Policy" in FAQ).

All returns require written approval from Axion Industries LLC. Original Shipping and return shipping charges are strictly non-refundable. For more information regarding our shipping refund policy, please refer to the "Refunds Policy" on FAQ.

Does it come with a warranty?

Axion Industries LLC does not offer any type of warranty coverage for defective products except those that are manufactured by us. However, the majority of the products available through our website are covered separately under a manufacturer's warranty.

If you recently purchased a product from Axion Industries LLC and are concerned about the fitment or performance of your item, please contact us for assistance.

Our customer service representatives can provide limited support, advice, and assistance identifying the possibility of any manufacturer defects. If we suspect your product does have serious defects, our customer service department can serve as a contact with the manufacturer to help arrange a warranty inspection and, if applicable, any necessary repairs or replacement shipments.

If you wish, you may also contact the manufacturer directly for information regarding product eligibility and specific terms and conditions of warranty coverage.

What happens if I want to cancel?

Unfulfilled, cancelled orders will require a 10%-30% cancellation fee unless you choose store credit (a 5%-15% cancellation fee will apply in this case). This fee is to:

  1. Recover the processing fees for both the order you placed and the order
    you canceled.
  2. Cancellation fees imposed by the manufacturer, should the part be coming
    straight from them. OR
  3. Restocking fees, since the part now has to be resold.

The following may NOT be canceled:

  • Orders that are already fulfilled – the Returns Policy will apply.
  • Pre-orders - the Returns Policy will apply.
  • Special Order items that were approved for sourcing by the customer.
  • Items that are on sale and labeled "final sale" during that sale period.

Please see "Order Cancellation" under FAQ for more.