The new Flowmaster ® FlowFX ® cat-back exhaust system for the 2011 to 2019 GM Silverado/Sierra 2500/3500 HD trucks with the 6.0-liter engine is manufactured using durable 409 stainless steel throughout and features 3-1/2 Inch mandrel bent pipes for better exhaust gas flow, and a FlowFX “straight-through” muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +21 Horsepower and +23 Pound Feet at the rear wheels. This system exits out the side, behind the rear wheel with a 5.00 Inch black ceramic tip for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home.
Some features and benefits of the Flowmaster FlowFX Cat-back System
Flowmaster® is a household name, and for good reason. They’ve built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.
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