600 bucks for a Borla C4 exhaust will be hard to do... People rarely sell this exhaust too.. Even rarer for it to be on a C4. The LT4 grand sport and the LT1 vette would use the same cat back exhaust too.. 600 dollars is what it costs for a camaro... It'd be more for the Vette... probably around 800 dollars. Check thunderracing.com , tybrne motorsports and internet racing supplies.