Active Autowerke E9X M3 GESI Catted Connecting Pipes

This is an upgrade kit, not a complete X-pipe. It is a pair of front connecting pipes, each with a 4 in GESI G-Sport high-flow catalytic converter, made for E9X M3 owners who already run the Active Autowerke Signature Track Pipe with X-Pipe on the S65 V8. The new pipes take the place of the straight front sections and work without a performance tune.

If you do not own the Signature X-pipe yet, the complete X-pipe with GESI cats is sold as its own part.

GESi HO-Series Gen 2 Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant, perfect for use on 1996 and newer vehicles. 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.

What It Does

The front section of the Signature X-pipe is held on with V-band clamps, so the straight pipes come out and these catted pipes go in. The rest of the X-pipe stays as it is, along with its scavenging effect. Active Autowerke has measured 12+ rwhp from the X-pipe with its Signature exhaust and 10+ rwhp with the factory exhaust on its own chassis dyno, and the complete X-pipe weighs about 25 lb against roughly 40 lb for the factory part.

Materials and Construction

TIG-welded, brushed 304 stainless steel with factory-style flanges and a cast stainless upper V-band for a precise fit. Each GESI converter uses a 400 cpsi substrate furnace brazed to the mantle, is rated for 300-500 hp per cat and handles up to 1,500 F, and reaches operating temperature within about 9 seconds of start-up.

Features

• Two 4 in GESI G-Sport high-flow cats
• Bolts to the existing Signature X-pipe
• Cast stainless upper V-band
• Factory-style flanges, no cutting or welding
• No tune needed, per Active Autowerke
• Made in Miami, Florida

Specs

• Part number: 11-083
• Brand: Active Autowerke
• Type: catted connecting pipes (pair) for the Signature X-pipe
• Catalyst: GESI G-Sport, 4 in, 400 cpsi, rated 300-500 hp per cat
• Material: brushed 304 stainless steel
• Engine: BMW S65 4.0L V8
• Shipping weight (Active Autowerke): 30 lb (13.6 kg)

Fitment Notes

• Requires the Active Autowerke Signature Track Pipe with X-Pipe already on the car.
• Active Autowerke fitment applies to US-model cars only.
• Active Autowerke covers the converter shell and tube ends for 5 years / 50,000 miles and the catalyst core for 2 years / 25,000 miles for the original buyer. Excessive burble (more than stock) voids that cover because it destroys the core. The pipework carries the standard 1-year warranty.
• Questions before you order? Call or text (310) 231-0292 or email Online@AutoTalent.com.
• Shop the Active Autowerke exhaust range or the full Active Autowerke line.

FAQ

Is this a full X-pipe?
No. It is the pair of catted front pipes for an X-pipe you already own.

Do I need a tune?
Active Autowerke says no performance tune is needed.

Does it fit the E90 sedan?
Yes. It fits the E90, E92 and E93 M3.