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      04-26-2010, 12:20 PM   #11
Drives: 2008 E92 M3 DCT JZB/FR
Join Date: Jan 2010
Location: London, England

Posts: 638
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The rasp stems from the design of the exhaust ports and valves. Some exhausts will almost nulify the rasp, but it's still there whatever exhaust you fit
alpina527 is offline   United Kingdom
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