ummm... you can put camber plates on the back of a z31 or s130 they just won't do anything, the plates he linked to are both for the fronts, one is simeple a solid mount hat the other is the adjustable camber plate and the rest are for other chassis, none are for the rear of an s130, the s130 uses a trailing arm, the shock position has nothing to do with the amount of camber, if you want to adjust the rear camber you either modify the crossmsmber where the trailing arms mount op or put adjusters int he training arms themselves, I havn't seem the arms themselved modified but seems logical, real plates, ain't gonna happen, and aoneone who says they do is an idiot