These are 1973-1974 Chevrolet/GMC C/K 10 manifold back exhaust kit with 2.25-inch 16-gauge aluminized tubing to reduce back-pressure and improve engine efficiency. It's mandrel bent to eliminate any crush sections in the tubing to help maximize the exhaust flow for better performance.
Features:
Mandrel Bent Tubing Eliminates Restrictions in Bends and Improves Exhaust Flow