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Mission’s tune is even smoother than stock and has much better/safer AFRs. And, with their new transmission tune, the car is a beast. Considering the M40i is technically already running an MPPSK implementation of the B58 I’m not sure our cars will ever get another oem option. There are questions if there are any small hardware changes to the B58 in the new upcoming 3-series which is rated at 385hp for the US. Time will tell.
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X3 M40i G01, M235i F22, 335 F30 MSport, 135 DCT, 335 E92, Audi A3
Last edited by TreDirtyFive; 12-24-2018 at 05:03 PM..
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