Ray, You came to the right place. I have a '88 750il w/ the Dinan chips. It made a little difference in the low end, but not very noticeable. The chip make the motor come to life at 3500 rpms+. With a stock motor and the Dinan chip, you should pump out 326hp@4200. Does anyone have any actual experience with either Dinan or Conforti chips, cams, etc.? I have a 88 750il with 158k miles.