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I know you guys claim a 5-6hp gain; any charts for that? You also said it sounds throatier than stock which makes me interested so how much would it be installed? I had alot of stuff installed on my e46 m3 by you guys and steve, so I'm thinking about coming down there again, thanks.
Last edited by stealthM3; 02-09-2011 at 07:44 PM..
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