NOTE: This item is not CARB legal! 

"This system provides the maximum flow available and restores the sports car growl expected from a BMW M-Series car. An available option replaces the restrictive secondary cats with high-flow 100 cell flat cats that changes the sound slightly providing a deeper sound. There are also plans for a future resonator upgrade for those who prefer a smoother sound to their exhaust systems.

Active Autowerke is able to improve on the factory mid-pipe by increasing the flow and removing the two sets of resonators. The X-Pipe design has a scavenging effect that yields modest horsepower gains.

The Active Autowerke X Pipe system is constructed of 100% 304 brushed stainless steel and has a industry standard warranty against rust.

This latest addition to the Signature line up is a must for the true Enthusiast looking for a better sounding car to match amazing performance." - Active Autowerke

Features:

• Durable 100% 304 Stainless Steel
• Only single cut needed with Factory Style Flanges and clamps
• Install to all systems that use factory style fitting
• One year warranty
• Replaces (not removes) secondary cats for better flow and sound

FITS:

BMW G80 M3/G82 M4