Gibson 19-23 Silverado/GMC Sierra 1500 5.3L Crew Cab Cat-Back Dual Split ExhaustMade to last the new Chevy Silverado Gibson Exhaust Dual Split Cat Back System is here. For the enthusiast who wants an awesome look and aggressive throaty sound this Dual Split Cat back exhaust is for you. Gibson Exhaust Systems decrease backpressure and produce more torque and increased horsepower. Typical gains average of 18 20 horsepower. Exhaust exit uses the factory Tips and exit straight out the back. Exhaust sound is louder under towing