Active Autowerke Valved Rear Exhaust - M340i / M440i w brush tips (11-089) 5018 Active Autowerke has engineered the

Active Autowerke has engineered the F8X Mid Pipe specifically for the F80 M3 and F82 M4 to improve exhaust flow by replacing the restrictive OEM mid pipe with a unique oval-shaped 3

10 rows of high pressure bar/plate oil cooling

It flows 46% more than stock

Resulting parts are very lightweight and strong

In comparison

Active Autowerke Valved Rear Exhaust - M340i / M440i w brush tips (11-089) 5018 Active Autowerke has engineered theThe Active Autowerke Valved Rear Exhaust for the M340i and M440i enhances exhaust note and performance while retaining BMW's stock valve control. Designed as a rear axle back replacement, this system addresses the overly quiet factory exhaust sound to deliver a deeper, more aggressive tone fitting the BMW 'M' badge. Made in the USA with 304 stainless steel construction Utilizes BMW's OEM valve actuator for optimized flow and resonance Low, deep sound