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Dinan previously released pre and post tune power for the x3 m40i (same tune as the 540i w/ mppsk) and their stock numbers were like 445hp/440trq at the crank with an assumed generous 20% drivetrain loss, that would put it close to what bmw rates it at the WHEEL. This either means bmw lists wheel hp/trq or continues to waayyy underrate their cars. Either way...my car feels 400+ hp
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