Chrishova -like Classy said, yes, these are bigger... much bigger -these are bigger than the stock front brakes (as far as rotor size goes) on 04+, but there is a slight downside for 04+ as to put GXP rear brakes on a 04-08 GP you have to swap a 97-03 GP/05(?)-13 Impala/97-04 Regal/00+ Monte Carlo rear knuckle/ebrake/rear ebrake cables.