B&M Racing Differential Cover (71506) 1557 BMW E9X M3 Triple Pass

BMW E9X M3 Triple Pass High-Performance All-Aluminum Radiator

while being able to squelch drone 100%

Many Have Extra O-Rings

The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light

Increases horsepower by 6 whp and torque by 12 ft-lbs

B&M Racing Differential Cover (71506) 1557 BMW E9X M3 Triple PassB&M's Cast Aluminum Differential Cover for the AAM 9. 5 and 9. 76 differentials is designed to strengthen the differential by preventing case distortion and ring gear & bearing cap deflection. Constructed of military grade (MIL A 8625) black anodized A356. 0 T6 aluminum, these rugged covers significantly increase the fluid capacity and dissipate heat much faster than the stock factory unit to prolong the life of your ring and pinion gears. Additional