The kit includes an exhaust pipe, tail pipe, and 3-way catalytic converter. Give your Sierra increased horsepower and a more assertive sound with the GMC Performance 5.3L Long Wheelbase Cat-Back Single Exit Exhaust Upgrade System. This exhaust system offers an increase of up to 7 horsepower and 4 lb.-ft. of torque, while reducing backpressure by 35% at 300-g/s, based on correlated flow testing. Designed and validated by Chevrolet Performance engineers, this 304 Stainless Steel Cat-Back System is tuned to maximize the performance experience while minimizing drone. This Performance Exhaust Upgrade System includes the rear muffler assembly, Y-pipe, exhaust clamps, polished tip and all necessary mounting hardware. It is 50-state emissions legal and will not void the New Vehicle Limited Warranty. Give your vehicle a throaty purr with a GMC Accessories Exhaust System Kit. This kit reduces restrictions in the exhaust pipes and expands the diameter of stock pipes, allowing your engine to breathe better, and is made from T-304 stainless steel. This GMC accessory can help to personalize, customize, or optimize the capability of your vehicle for your lifestyle and use.

The kit includes an exhaust pipe, tail pipe, and 3-way catalytic converter. Give your Sierra increased horsepower and a more assertive sound with the GMC Performance 5.3L Long Wheelbase Cat-Back Single Exit Exhaust Upgrade System. This exhaust system offers an increase of up to 7 horsepower and 4 lb.-ft. of torque, while reducing backpressure by 35% at 300-g/s, based on correlated flow testing. Designed and validated by Chevrolet Performance engineers, this 304 Stainless Steel Cat-Back System is tuned to maximize the performance experience while minimizing drone. This Performance Exhaust Upgrade System includes the rear muffler assembly, Y-pipe, exhaust clamps, polished tip and all necessary mounting hardware. It is 50-state emissions legal and will not void the New Vehicle Limited Warranty. Give your vehicle a throaty purr with a GMC Accessories Exhaust System Kit. This kit reduces restrictions in the exhaust pipes and expands the diameter of stock pipes, allowing your engine to breathe better, and is made from T-304 stainless steel. This GMC accessory can help to personalize, customize, or optimize the capability of your vehicle for your lifestyle and use.