One of the most popular and useful upgrades available today for the GMC Sierra, 1999-2018 cat-back exhaust systems offer boosted horsepower and torque, an exciting new exhaust note, and even a bit of style with their polished or ceramic-coated slash-cut tips. Designed by some of the most experienced companies in the business, such as Gibson, MBRP, aFe, Stainless Works, Borla, and CGS Motorsports, these cat-backs are generally made in either T-409 or T-304 stainless steel, with some budget models produced in aluminized steel. Large-diameter mandrel-bent pipes, free-flowing mufflers, and similar design features cause exhaust vapors to stream out fast and strong, cleansing the system of backpressure for decent horsepower and torque gains. These cat-back exhaust systems are available for GMC Sierras outfitted with 5.3L V8 engines, 6.2L V8 motors, and 4.3L V6 engines – AmericanTrucks has all the bases covered.

 

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Fitment Includes

• Base, C3, Classic, HT, Hybrid, Nevada Edition, SL, Z71, Denali, SLE, 1500, SLT and WT Sierras
• Engines: 4.3L Vortec V6, 4.8L Vortec V8, 5.3L Vortec V8, 5.3L Flex-Fuel Vortec V8, 5.3L Vortec V8 Hybrid, 6.0L Vortec V8, 6.2L VVT Vortec V8, 4.3L EcoTec3 V6, 5.3L EcoTec3 V8, 6.2L EcoTec3 V8 Sierras

*Please see Sierra parts pages for any exceptions.