 Additional upgrades also consisted of stainless steel dual exhaust outlets, larger Corvette sourced PBR brakes with EBD, larger front vented rotors with vented rear rotors, and functional heat extractor hood scoops.The Bonneville introduced the GXP trim level to replace the SSEi.The Bonneville GXP featured a 4.6 Northstar V8, borrowed from Cadillac, and replaced the Supercharged 3800 Series II.