Give your Sierra increased horsepower and a more assertive sound with the GMC Performance 5.3L Short 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. The kit includes an exhaust pipe, tail pipe, and 3-way catalytic converter. 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.

Give your Sierra increased horsepower and a more assertive sound with the GMC Performance 5.3L Short 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. The kit includes an exhaust pipe, tail pipe, and 3-way catalytic converter. 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.