Active Autowerke AFlow Catted Downpipe – Toyota GR Supra MKV (A90 / A91, B58)

OVERVIEW

The Active Autowerke AFlow catted downpipe for the A90 / A91 Toyota GR Supra 3.0 replaces the restrictive factory downpipe with a 4.5 inch stainless steel unit built around Active Autowerke's in-house AFlow high-flow catalyst. It tapers to 3.5 inches through a flex joint before meeting the OEM 80mm connection. Active Autowerke's dyno testing shows roughly 18 wheel horsepower on the stock tune when paired with the Active Autowerke Signature exhaust.

TIG-welded from 304 stainless steel and rated for builds up to 800 horsepower, with no check-engine light.

SPECS

• Active AFlow high-flow catalyst (in-house, not GESI) — catted, no CEL
• 4.5" piping tapering to 3.5" with flex joint, 80mm OEM connection
• 304 stainless steel, TIG-welded
• +18 whp on the stock tune with this downpipe and the Active Autowerke Signature exhaust; +53 / +94 whp with the Stage 1 / Stage 2 tunes
• Rated for builds up to 800 hp
• Warranty: 5 yr / 50,000 mi on the shell and tube ends; 2 yr / 25,000 mi on the catalytic core; original purchaser only; void if the car has excessive (louder-than-stock) burble

PARTS INCLUDED

• Catted AFlow downpipe
• Turbo flange gasket (pre-installed)

TECH RESOURCES

Additional Parts Required

• None. No modifications are required to fit this downpipe.
• Optional, to reach the quoted figures: the Active Autowerke Supra MKV A90/A91 Performance Rear Exhaust.

Installation

• Active Autowerke — Catalytic Converter Break-In Instructions (PDF) — follow this procedure on the new cat to avoid a check engine light appearing in error.
• Professional installation recommended.
• Request an Install Appointment

Notes

• Please note: These catalytic converters are not legal for use on vehicles registered in the state of California as a result of California Vehicle Code Sections 27156 and 38391.
• Note: Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. The catalytic converter will produce emissions that meet the standards set by the EPA, not CARB.
• Fits 2024-and-older GR Supra 3.0 (B58).

PART NUMBER

• 11-564A

VEHICLE APPLICATIONS