This Flowmaster® Flow FX® cat-back exhaust system for the 2011-2019 GM 2500HD/3500HD trucks with the 6.0-liter engine is manufactured using durable 409 stainless steel throughout and features 3.50 to 3.00-inch mandrel bent pipes for better exhaust gas flow. This system exits with dual 4.00-inch black stainless steel tips for added style and a custom look. Max gains of 10 hp and 10 lb-ft of torque at the rear wheels over stock. 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. Fits extended cab or crew cab models with the 6.5 foot bed only. Backed by Flowmaster's Lifetime Limited Warranty.

• 3.50-inch to dual 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
• 4.00-Inch black stainless steel tips add a custom look to the truck
• Flow FX “Straight Through” muffler delivers and aggressive to moderate sound level with increased performance
• Includes complete hardware and factory styled hangers in the stock locations for an easy installation
• Max gains of 10 hp and 10 lb-ft of torque at the rear wheels over stock