For factory performance you can install the 00 Cobra R calipers and rotors which are basically the same setup as the GT500 except scaled down for a perfect fit. you will need to get new wheels, with a good amount of offset to clear the calipers. fyi 03 cobra five spoke wheels will work.I just read an article in some stang mag. and they installed a set of brakes from a new gt 500 and although they had to do some cutting it fit. Now I've lowered my stang bout an inch and when I did I noticed the wheels rub on me now and I just dont see why I'm haveing this problem if these guys are useing I think they were 18x10's.I'm planning on upgradeing my brakes soon and was wondering if anybody had any knowlage on this.just how big of a brake and rim/tire package can you go with once you've lowered your fox?