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Originally Posted by motordavid
Skip the Chip...expensive and "the diff" will be minimal to zip, other than psychological,imo.
Suggest to your Hub that He reads the Manual and the near encyclopedic info to be found on the X5World home page.
He must be lucky having theMissus do all the leg work. 
GL,md |
Agreed. 15hp in a 4900lb vehicle is not going to give you anything more than a "psychological" bump in performance, not to mention a low mpg because you'll be stabbing the throttle all the time to see if it's really quicker.