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      01-14-2014, 02:11 PM   #18
hetzle
First Lieutenant
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Drives: E90 335i
Join Date: Dec 2011
Location: Los Altos, California

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I've never heard a noise like that before, best of luck!
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2011 335i sedan 6MT, JB4 w/FlexFuel wires, AA 4" DP, VRSF 7" FMIC, AA turbo-back exhaust, ST Coilovers, BMS Intake, UUC DSSR+SSK, ER CP, BMS CDV, BMS OCC, Arkym CF trunk