Gibson 21-22 GMC Yukon/ Chevrolet Tahoe 5.3L 2/4wd Cat-Back Dual Split ExhaustFor the enthusiast who wants an awesome look and Mild sound this Dual Split Cat back exhaust is for you. Gibson Exhaust Systems decrease backpressure and produce more torque and increased horsepower while maintaining similar factory interior sound levels. Typical gains average of 15 20 horsepower. Stainless dual Tip exit straight out the back. Works with most bumpers, roll pans and trailer hitches. Exhaust sound is louder under towing conditions.