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Does anyone have a boost gauge? How much boost are you guys pushing with the MPPK and the RC?
I'm shopping around for the MPPK for my wife's sDrive35i and planning on getting it installed at the local BMW stealership. Wondering if stacking the RC is safe. Anyone tried a JB on an x5? Going for MPPK first, though, since I still have warranty to worry about, it's a brand new X5.
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'07 Space Gray 335i coupe - R.I.P.
COBB ProTuned | AMS | CP-e | BMS | Quaife
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