ECS Tuning has been my favorite go to. Good prices, fast shipping. They don't have a huge selection on aftermarket performance stuff (amazing selection of OEM and aftermarket maintenance), so otherwise I watch for group buys, used parts, or lots of searching. I'll usually start there.
Prices can vary a lot so it pays to really shop around.
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2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
Last edited by Freon; 11-22-2014 at 01:41 PM..
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