it has smoothed out the flat spots in the power band, the car accelerates quicker, & uses less fuel. i went from 10.5 to 13.9 m.p.g. around town. a great improvement i appreciate since most of my driving is short trips. it is most definitly an improvement over the stock chip.

thanks again mark for the great chip upgrade!!!

tim s.
1995 540i/a
1987 325e