I can't imagine running with out an LSD. I'm about 425 WHP and 470 lb/ft. I've been running the M factory helical for 1 1/2 yrs now. In my opinion best mod to support a good tune.
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2011 35i BMS High & Low side OCC, Custom tune, CDV delete, Eldor coils, ER Charge Pipe w/Tial BOV, ER Comp. FMIC, K&N drop in,40W LED Halo, LCI side markers, M-Factory LSD, NGK plugs, Racing Dynamics strut brace, Stubby, Windrestrictor
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