Active Autowerke F8X BMW M3 & M4 Equal Length Mid Pipe includes Active F - brace (11-055AR)

Active Autowerke F8X BMW M3 & M4 Equal Length Mid Pipe includes Active F - brace (11-055AR)The Active Autowerke F8X Equal Length Mid Pipe is engineered specifically for the F80 M3 and F82 M4 models to address the uneven exhaust pulse caused by differing downpipe lengths. This patented mid pipe equalizes exhaust lengths before mixing, resulting in a more balanced and refined S55 engine sound. US Patent 11248511, UK and EU patent 3882441 Designed to correct length variance between front and rear downpipes Features a crossover with sinusoidal

The Active Autowerke F8X Equal Length Mid Pipe is engineered specifically for the F80 M3 and F82 M4 models to address the uneven exhaust pulse caused by differing downpipe lengths. This patented mid pipe equalizes exhaust lengths before mixing, resulting in a more balanced and refined S55 engine sound.

• US Patent 11248511, UK and EU patent 3882441
• Designed to correct length variance between front and rear downpipes
• Features a crossover with sinusoidal pipes for smooth sound blending
• Engineered for exact fitment on F80 M3 and F82 M4
• Recommended resonator option for cars with catless downpipes

This mid pipe improves turbo spool response and enhances low-end and mid-range power while eliminating the pulsing noise caused by unequal downpipe lengths. It maintains compatibility with existing rear exhaust systems, delivering a distinctive six-cylinder sports car exhaust note without requiring rear system modifications.