It's 06+. I have them on my 00 GPGT right now with stock 16" wheels. You may have to bend the bracket that holds the brake line to the frame to be sure the hose didn't get in a bind when turning lock to lock. I did on my GP. They are dual piston and steel, unlike the F-bodies which are aluminum. All the bolts/hardware from the Imp bolted right on without any adapters. I have a post somewhere on here that shows how they fit and what I did. A quick search should turn up more info as well.