If you're looking to add a little style to your Truck or SUV and want to keep the exhaust from affecting your tow trailer, this Dual Cat back Exhaust System is for you, exiting behind the rear tire for a look that sets your vehicle apart on the street or in the dirt. Hassle free, bolt - on installation with professional looking results. No welding required. Backed by a Lifetime Limited Warranty. Gibson Dual Sport Exhaust System offers a powerful authoritative deep exhaust tone with no annoying noise inside the cab. Dyno tested to assure increased horsepower and produce more torque. Average horsepower gains are 10 - 15 and 15 - 20lb - ft of increase torque.