Active Autowerke Signature X-Pipe with AFlow Cats – BMW M3 (E9x)

OVERVIEW

The Active Autowerke Signature Track Pipe with X-Pipe and connecting pipes for the BMW E9X M3, supplied here with two Active AFlow super high flow catalytic converters that will not produce a check engine light, so no performance tune is needed. Engineered to work with most aftermarket exhaust systems and mufflers as a true bolt-on with no cutting, welding or modification, it improves on the factory X-pipe design with a scavenging effect and saves weight — 25 lbs for the X-pipe against the factory system's 40 lbs — for gains of 12+ RWHP on Active Autowerke's Mustang chassis dyno alongside their Signature exhaust system, or as much as 10+ RWHP with the BMW stock exhaust. Active's proprietary precious metal loading greatly reduces emissions, while the reduced back-pressure lets the engine make its power.

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 converter warranty: 5 years / 50,000 miles on the shell and tube ends and 2 years / 25,000 miles on the catalytic core, original purchaser only; void if the car has excessive burble (louder than stock)
• Made in Miami, Florida

PARTS INCLUDED

• Active Autowerke Signature X-Pipe (100% 304 brushed stainless steel) with connecting pipes
• Two Active AFlow super high flow flat catalytic converters
• Cast upper stainless steel V-band

TECH RESOURCES

Additional Parts Required

• None. Active Autowerke specifies no additional hardware for this part — it bolts to the factory style flanges and works with the stock rear exhaust or most aftermarket systems that use factory style fittings.

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.
• 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 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.
• Optional pairings in store: Signature Rear Exhaust for E90 / E92 M3, Signature Rear Exhaust for E93 M3 Convertible.

PART NUMBER

• 11-018A

VEHICLE APPLICATIONS