Give your Sierra increased horsepower and a more assertive sound with the GMC Performance 6.2L Long Wheelbase Cat-Back Dual Exit Exhaust Upgrade System. This exhaust system offers an increase of up to 13 horsepower and 8 lb.-ft. of torque, while reducing backpressure by 40% at 335-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 and all necessary mounting hardware. It is 50-state emissions legal and will not void the New Vehicle Limited Warranty.

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• Upgrades the look and sound of your vehicle’s exhaust system
• Helps to reduce restrictions in the exhaust system
• Allows the engine to breathe better
• Includes rear muffler assembly, front resonator assembly, exhaust clamps, polished tip and other mounting hardware
• Exhaust pipes run through the bumper
• 40% backpressure reduction at 335-g/s, based on correlated flow testing
• Helps increase power by up to 13 hp and 8 lb.-ft. of torque
• 50-state emissions legal and will not void the vehicle warranty when installed by an authorized GM dealership