Originally Posted by BIU
19x10 ET20 fronts are perfectly flush with either 265/30 or 275/30 [Tire brands with rounder sidewalls] (Lowered / No crazy camber or anything)... So I would guess your ET15 fronts would be good to go if you do some tire stretching + camber..
The rears will definitely need MAJOR surgery to make it happen... those offsets are way out in left field for the E9x M chasis
Powerbeast has some LMs with new barrels in the works.. His rears are x11.5 ET21 which are already uber aggressive.. +4 on the other hand...
I definitely plan on some moderate stretch and perhaps 2~3 degrees of camber all around, but I don't think the 11.5 +4 would be a big issue, especially since i'm pretty certain these fenders are just as big, if not bigger, than the e46M ones, but i'm iffy on pulling the trigger on such an aggressive set up, being my first one on the car