This Flowmaster® Flow FX® cat-back exhaust system for the 2004-2015 Nissan Titan with the 5.6-liter engine is manufactured using durable 409 stainless steel throughout and features dual 2.5-inch mandrel bent pipes for better exhaust gas flow, and a Flow FX "straight-through" muffler is used for a moderate sound level and maximum performance. Gain up to 4 hp and 5 lbs-ft of torque at the rear wheels over stock. This system exits out the sides with dual 4.5-inch black ceramic tips 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. Backed by Flowmaster's Lifetime Limited Warranty.