Gene V
03-01-2002, 11:49 AM
I have a 97 M3 with Jim C software and CAIS, among other mods, and am contemplating a rear diff change to a 3.46 final drive. Am wondering how much this will improve acceleration. Also, the car is autox'd regularly on an open track...will I be up and downshifting between 2nd and 3rd too much to realize the benefit of the lower gearing. Cost is about $1800 from BMP Design with core.