MBS E9X M3 Test Pipes – E90 | E92 | E93 M3 (S65 Engine)
Unlock the full potential of your S65 V8 with the MBS Test Pipes for the E9X M3. Designed to replace the restrictive factory catalytic converters, these test pipes free up exhaust flow, reducing back pressure and delivering noticeable gains in horsepower and torque when paired with t
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Shop installed it with ease and so far no conplaints