I did a thing and converted the ‘04 brakes to ‘05 GTO brakes. DBA slotted rotors front and rear. Hawk Ceramics for a C5 Corvette. ‘05 GTO front Calipers.
Main differences are much larger and thicker rotors, the rear rotors are now vented, and the front calipers are bigger and redder.
It stops really decisively now. I’ve never had a brake pedal this firm before. It feels great. Totally worth the $400 or so.