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Possibly the best mod for any BMW F32/F33 4 Series or F82 M4
we recommend professional help from a shop to install
Valvetronic designs have been pushing the American market forward with a new generation of Corvette C7 exhaust systems
3 & center fire BMW manifolds
- Increased Sound
BMW M3/M4 F8x Equal Length Valved Exhaust Mercedes Benz bov Possibly the best mod forWelcome to the Valvetronic Designs catback exhaust system for the F8x platform, or in other words, the solution to the F8x sound problem. For years enthusiasts have been wanting to find a solution to the buzzy and raspy sound these cars produce from the factory. Since these cars were released back in the late portions of 2014 we all knew there was an amazing sound lying under all the rasp. Our mission has been to find this hidden sound and allow all
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