High Flow Crossover Exhaust Pipe for 2021+ BMW G80 G81 M3 G82 G83 M4 S58 3.0T The KYOSTAR High-Flow Crossover Exhaust Pipe is designed for selected BMW S58-powered M models, including G80/G81 M3 and G82/G83 M4 applications. This performance crossover pipe improves exhaust flow efficiency while supporting a deeper, more aggressive exhaust tone compared with the factory exhaust section. Featuring a high-flow crossover design, this exhaust upgrade helps balance exhaust pulses
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