Chevrolet Corvette (C7) Stingray/Z06 - Valved Exhaust with Post Cat Spare Pipes - Carbon Fiber Tips (CES3)Incorporates a more aggressive sound than our C7 Z06 system with adapter for OEM Post Cat Pipes. The iconic CAPRISTO Valved Exhaust System offers the best of both worlds through its capability to produce an aggressive exhaust note under acceleration, and a more subdued sound for city driving. This feature is possible using vacuum actuated valve flaps that open and close depending on driving conditions and input from the driver. At lower engine speeds