OVERVIEW

Toyota and BMW jointly developed the Supra MKV around the B58 inline-six, a valvetronic single-turbo version of BMW's direct-injection engine, and its factory downpipe is quite restrictive — slowing the exhaust gas that drives the turbo, and with it spool. The Active Autowerke Signature catted downpipe releases that potential with 304 stainless piping that starts at 4.5" and uses the fewest bends possible, never dropping below the 80mm stock size. Dyno-tested at +18 whp with the Signature exhaust on the stock tune, and +53 and +94 whp on the Stage 1 and Stage 2 tunes, it carries a 4.5" high-flow GESI catalytic converter stamped N/GBL/4389/1119 — EPA registered, third-party verified to test protocol 40CFR86, and it will not produce a CEL.

SPECS

4.50" diameter piping at the turbo for maximum power output
Tapers to 3.5" with a stainless flex joint, then to 80mm to meet the OEM exhaust
Diameter never drops below the 80mm stock size
Constructed entirely from 304 stainless steel with 1.5mm wall thickness
Durable construction from TIG-welded 304 stainless steel
4.5" high flow GESI catalytic converter — no CEL
GESI EPA registered and fully OBD2 compliant
Cast upper V-band for precise fitment
Rated for 500 to 850 hp applications
Withstands up to 1500°F
Reaches operational efficiency within 9 seconds of startup
+18 whp with this downpipe and the Active Autowerke Signature exhaust on the stock tune
+53 whp with the Active Autowerke Stage 1 tune, +94 whp with the Stage 2 tune, using the catted downpipe and Signature exhaust
Quicker turbo spool and reduced exhaust back pressure
Easily bolts on — no cutting or welding required
Made in Miami, Florida

PARTS INCLUDED

Complete catted downpipe as supplied by Active Autowerke; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

None. Active Autowerke specifies no additional hardware for this downpipe — it bolts on with no cutting or welding.
Optional, to reach the quoted figures: the Active Autowerke Supra MKV A90/A91 Performance Rear Exhaust. The +53 and +94 whp numbers additionally require the corresponding Active Autowerke Stage 1 or Stage 2 tune.

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.
Active Autowerke's complete installation library: Active Autowerke — Installation Instructions.

Notes

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. There is no mention or reference to cell density or converter volume dimension. The GESI catalytic converter will produce emissions that will meet the standards set by the EPA, not CARB.
The original listing carried no fitment chart; the table above reflects the Supra MKV 3.0 application stated by Active Autowerke. This downpipe is not for the 2.0L B46 Supra — confirm fitment with Speed Logic if you are unsure.

PART NUMBER

11-564

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
Toyota	GR Supra 3.0	A90 / A91	B58 3.0L Turbo I6	2020+