Stock exhaust vs Akrapovic Evolution exhaust, Evolution Racewerks catless downpipes, BMS air filters, and JB4 tune. This is an exhaust sound comparison video and nothing else. Dyno numbers were not logged on this run. You can find more information on these cars at http://f80.bimmerpost.com/.
BMW F82 M4 Exhaust Sound – Stock vs. Akrapovic Exhaust + Evolution Racewerks Downpipes
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