Thread: Custom exhaust!
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      01-29-2013, 09:13 AM   #29
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Drives: 2015 Alpina B6; 430i; X5 40e
Join Date: Jul 2010
Location: Orange County, CA

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What are the benefits of quad tip/pipe? On S2000 (another I4 engine) turbo setups a single pipe produces the best performance but drones at resonant frequencies. Dual pipe setups are tuned to mitigate this drone. Is there a benefit to quad in the N20 or is it purely cosmetic? The 1 series M coupe is only dual pipe correct? Is there a benefit to quad on the other M vehicles (more cylinders)?
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Past: E36 325i, E39 540i, F46 323i (AA tuned), E82 3.0NA, E84/F30 N20 BMS Stage 1, E70 X5 N55, F06 N55
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