01-23-2017, 07:24 PM | #27 |
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my opinion is to also change downpipe first, wait for ECU to fully break in and then decide if you want more sound or not.
you will save alot of reasonable money on an axle-back VS a whole catback. stock BMW exhausts are well designed from the factory with the only real backpressure being from the downpipe. |
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01-25-2017, 02:47 PM | #29 |
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