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Installing a 2014-2018 cat-back exhaust on your GMC Sierra not only gives you torque and horsepower gains, but gives you multiple choices in the number of exhaust tips and where they appear on your truck, enabling a customized appearance. AmericanTrucks’ assortment of aftermarket cat-back exhausts includes plenty of well-merited big names like Borla, aFe, MBRP, Gibson, and Magnaflow, all of which produce topnotch cat-backs that deliver good performance and a deep, stronger, more powerful sound. There are cat-backs available for 4.3L V6 engines, as well as 5.3L V8 cat-backs and 6.2L V8 cat-backs. Despite all this variety, you can expect them to have things in common – mandrel-bent construction that lets exhaust flow out freely rather than pinching the flow, construction out of stainless steel or, in budget models, aluminized steel, and easy bolt-on installation.


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Fitment Includes

  • 2014, 2015, 2016, 2017 & 2018 GMC Sierra 1500
  • Denali, SLE, 1500, and SLT Sierras
  • Engines: 4.3L EcoTec3 V6, 5.3L EcoTec3 V8, 6.2L EcoTec3 V8 Sierras

*Please see Sierra parts pages for any exceptions.

2014-2018 Sierra Exhaust Systems

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