AMS Performance Street Downpipe w/ GESI Catalytic Converter - Toyota Supra A90

The downpipe carries exhaust from the turbo to the rest of the system, and the factory one is a common restriction on a modified Supra. AMS's Street version uses large stainless tubing and keeps a high-flow GESI catalytic converter. The cat uses a new substrate and washcoat made to meet new-car emissions standards, not an off-the-shelf unit.

What you get

• 304 stainless construction, with a 4.5-inch mandrel-bent main section that steps down to a 3.5-inch flex section.
• GESI high-flow catalytic converter, rated for more than 800 horsepower.
• 80 mm (3.15-inch) outlet that works with a stock or aftermarket catback.
• Threaded O2 bungs in the factory positions, so the original sensors go back in without jumpers.
• Adjustable mounting bracket and installation instructions. It bolts to the factory mounting points with no cutting.

Good to know

• Made for US-market cars only. AMS says it won't fit world-market vehicles.
• AMS has not completed CARB testing. It won't ship this downpipe to California for emissions-controlled cars without a signed race waiver.

Brand: AMS · Part #: AMS.38.05.0001-2

Ships from the brand or distributor, usually in 3-7 business days.

For off-road / competition use only. Not legal for use on public roads in the United States, including California.

• Ships from the brand or distributor, usually in 3–7 business days.
• Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.