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Forged into a first-class operation by the relentless demands of the racing world, Flowmaster has achieved a leading place among companies that make 2007-2018 exhaust components, headers, and other performance parts for the GMC Sierra. All made in the USA, Flowmaster’s exhaust systems include a whole range of different sound levels, from mild to ferocious, with the noted American Thunder series falling at the loud, aggressive end of the spectrum. Their 2007-2013 and 2014-2018 cat-back exhausts include both aluminized steel versions covered by a 3-year limited warranty and all stainless steel variants that come with a limited lifetime warranty. Power, fuel mileage, and throttle response are all boosted by these strongly flowing, mandrel bent systems, alongside the exciting exhaust notes you can add to your machine. Buy them through American Trucks and you can enjoy free shipping on all $75+ orders as a bonus advantage.

Fitment Includes

  • Classic, Nevada Edition, SL, Z71, Denali, SLE, 1500, and SLT Sierras
  • Engines: 4.3L Vortec V6, 4.8L Vortec V8, 5.3L Vortec V8, 5.3L Flex-Fuel 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.

Flowmaster Sierra 1500 Parts

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Sierra 1500
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