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      10-18-2012, 09:41 AM   #13
conrad325i
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Drives: 2008 335i
Join Date: Aug 2011
Location: Knoxville, TN

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I put mine in about 15k miles ago. I have yet to recharge mine yet but of you just clean your MAF sensor and don't over oil you'll be better of on the mpgs. I've notices mpg gains since I put mine in and charcoal deleted. Like on average 1.5 mpg more. Idk why people think that it sounds noticeably better though bc it really doesn't.
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