VRSF High Flow Midpipe BMW M3 M4 S55 F80 F82VRSF High Flow Midpipe BMW M3 M4 S55 F80 F82 The OEM midpipe on the F80 M3 and F82 M4 is one of the most restrictive parts on the entire exhaust system. The VRSF 3. 5" High Flow Midpipe eliminates that restriction, reduces back pressure, and delivers 18+ horsepower and 30+ torque to the wheels when tuned. You also shed around 17lbs over the factory unit. Faster spool, more power, better sound, less weight. It is one of the best value modifications
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