Corsa 11 -12 Chevrolet Silverado Crew Cab/Long Bed 2500 6.0L V8 Polished Sport Cat-Back ExCorsa 11 12 Chevrolet Silverado Crew Cab Long Bed 2500 6. 0L V8 Polished Sport Cat Back Ex dB by CORSA's patented Reflective Sound Cancellation(R) (RSC) Technology allows acoustic engineers to create a drone free exhaust sound, and a deep aggressive rumble. Computerized; mandrel bent; straight through design for maximum airflow which improves fuel economy and performance. 3. 0in. Cat Back Single Side Exit with Single 4. 0in. Polished Slash Cut Tip 11