Parts & Accessories Spare parts For sale: Original Bullet cat-back Chevrolet Silverado | GMC Sierra Clean, guaranteed free of leaks and issues. Clean usage. It was installed on a vehicle without tuning, meaning it wasn't abused. The cat-back is electronic and comes with its device, wires, and remote. Single exit tips. It was installed on a GMC Sierra 2019+. The cat-back is clean and its new price is 4800 without installation. Best offer. Serious buyers only.