Originally Posted by Rom3n
Depends on what your car makes before the kit is installed. The VT1-535 is rated to add 30% more power to the M3. We rate all of our power based on the car being 100% stock. Running high flow / catless exhaust systems with our kits will add to the power gained.
Love the power gains (I'm considering the 535 kit maybe in a few months) however, is that stock number (~320) correct? That would be ~22% drivetrain loss? Just curious.