Hooker BlackHeart Cat-Back Exhaust SystemHooker BlackHeart introduces their Cat Back dual exit exhaust system for the 2014 2018 Chevrolet GMC Silverado and Sierra 1500 trucks with the 6. 2L engine. This system is designed with a 3. 5 inch inlet pipe and dual mandrel bent 2. 5 inch 409 stainless steel tailpipes that offer excellent corrosion resistance and maximum exhaust flow for improved performance. The system uses a polished high flow muffler design that not only looks good, but also