Thread: Quad exhaust
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      09-15-2011, 02:50 PM   #3
dcho
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Drives: SGM 135i
Join Date: Jul 2009
Location: Houston

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hartge rarabanana makes an exhaust in that style. theres a diffuser that goes with it too. but as with most quad exhuasts for the 135i, it will be quieter than non-quad setups.
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