Active Autowerke AFlow Super High Flow Cats Upgrade – BMW M3 (E9x)

OVERVIEW

Active Autowerke's Active AFlow cats upgrade is a set of connecting pipes with two super high flow catalytic converters for their Signature Track Pipe with X-Pipe on the BMW E9X M3. It is intended for owners who already run that X-pipe and want to remove the check engine light without a tune while meeting emissions requirements as specified by the EPA. It fits most aftermarket exhaust systems and mufflers and bolts on with no cutting, welding or modification. Active's proprietary precious metal loading greatly reduces emissions and eliminates most check engine lights, and these high flow converters outperform stock units.

SPECS

• Two Active AFlow Super High Output flat catalytic converters
• Ultra high flow 400 cell per square inch catalyst
• No check engine light for catalytic efficiency — no performance tune needed
• Increase of 10+ RWHP with the stock BMW rear exhaust
• 12+ RWHP measured when combined with the Active Autowerke Signature exhaust system (Active Autowerke Mustang chassis dyno)
• Rated for 300 to 500 horsepower per cat
• Withstands up to 1500 °F
• Reaches operational efficiency within 9 seconds of start-up
• Full 304 stainless steel construction, including the catalyst substrate, furnace-brazed to the mantle
• TIG welded 304 stainless steel; cast upper stainless steel V-band for precise fitment
• Bolts on with factory style flanges — no cutting or welding required
• Weighs less than 30 lbs versus the factory system at more than 40 lbs
• One year standard Active Autowerke warranty on exhaust products
• Catalytic converters covered by a 5 year / 50,000 mile warranty (on shell and tube ends)
• Made in Miami, Florida

PARTS INCLUDED

• Two Active AFlow super high flow catalytic converters with connecting pipes, as supplied by Active Autowerke; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• Active Autowerke Signature X-Pipe for BMW E9X M3 (11-017) — this product is a cats upgrade for the Signature Track Pipe with X-Pipe. You must already own, or buy alongside it, the Signature X-Pipe it connects to.
• Want the complete catted assembly instead? The Signature X-Pipe with AFlow Cats (11-018A) is supplied as one complete unit. GESI versions: GESI cats upgrade (11-083), X-Pipe with GESI cats (11-018).

Installation

• Active Autowerke catalytic converter break-in instructions (PDF) — follow this procedure on first start-up to avoid a check engine light being set in error.
• Active Autowerke's complete installation library: Active Autowerke — Installation Instructions.

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 Section 27156 and 38391.
• Active AFlow catalytic converters are EPA registered and compliant in 49 states, and fully OBD2 compliant for 1996 and newer vehicles, except in California and other CARB states.

PART NUMBER

• 11-083A

VEHICLE APPLICATIONS