Hello, The injen intake provides about 10-11 hp gain. See attached with graph for hp and torgue gains.
http://www.e90post.com/forums/showth...ighlight=injen
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Cobb AP v3 - Wedge tuned, Cobb FMIC, AR catted DP's, Dinan Stage 2 suspension, Koni Yellows, M3 control arms and strut brace, BMS chargepipe, BMS OCC, BMS Sport Oil Cooler Valve, BMS CDV, RB Turbo PCV, aFe Stage 2 SI intake w/scoops