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335iS Thread - [ Owners Only ]
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05-25-2019, 09:54 AM
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hellokitty
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Drives: '17 M3 ZCP DCT
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Originally Posted by
b92
rsyed07
hellokitty
How would you rate the loudness? With the stock iS exhaust being a ~3/10 and iS+catless downpipes being a ~5/10
6/10. The iS exhaust is pretty tame even with resonators in place of secondary cats.
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