Search around. I think the 91 318is came with a 4.1:1 LSD?
Probably the best bet. check the 318is versus the M3 diff.
I know some guys switch to lower ratios like the 3.73LSD
Some go the other way. depends on application Steet, autox, drag, track, fun, groceries, gas milage etc LOl
I think one 325 had a 4.1 in the autox Sunday and he said he was cranking it up to 4th gear where I was in 3rd. but thats with M20 6cyl
'87 325is Delphin Metalic
Last edited by Rfitz25; 05-29-2007 at 04:21 PM.