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BMW 3-Series (E90 E92) Forum
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exhaust back box
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| 06-02-2011, 03:07 PM | #1 |
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Brigadier General
 
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Rep 3,815
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exhaust back box
as its becoming apparent that I might have to hold off upgrading the 320D so thinkin upgrades
has anyone on here upgraded the back box on a 320D M sport already got the piggy box giving a power boost thinking a back box upgrade might help it breath better any suggestions thanks
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F30 335i M Sport - now departed
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