aFe Mach Force-Xp 3in SS Cat-Back Exhaust Chevy Camaro SS V8 (16-17) (49-34069-P)Mach Force XP 304 SS Cat Back Exhaust System with Quad Rear Exit by aFe. With NPP Valves. Max gain of +13 horsepower and +10 ft. lbs. of torque. With X Pipe Balance Tube, X Pipe. Exhaust System Type: Cat Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Exhaust System Sound: Aggressive Loud. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Cat Back