As far as I know the GTA rims are the same in terms of dimensions as the 16" IROC rims. I'm running the 16" X 8" IROC rims on my Monte SS, and I've found by experience that if you're going to use that type of rim, you need to get 4 front rims. I've found that there is a 13/16" difference in offset between the front & rear rims, and the rear rims won't work on the car without extra long wheel studs and thick spacers. To my knowledge the GTA rims are the same, and they are stamped either FRONT or REAR on the inside of the rim, so try to get 4 front rims for your car.
