Thread: 328i M peformance exhaust hp gains?
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      03-14-2013, 12:15 AM   #1
momo3605
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Drives: M340i LCI, 718 GTS 4.0
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328i M peformance exhaust hp gains?
Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?
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