BMW M3 (Sedan) Supersprint Street Muffler w/ Round Tips '06-'11

Resonated design means each unit has no chambers or baffles to reduce velocity. Straight in & out design. Internal components are stainless steel with a high heat sound suppressing material not found in any other systems. Tubing is mandrel bent for maximum flow. Flanges and hangers are O.E. for a perfect fit. Steel systems are aluminized on the inside and out and black heat coated for corrosion prevention.