Gibson 21-22 GMC Yukon/ Chevrolet Tahoe 5.3L 2/4wd Cat-Back Dual Extreme ExhaustFor the extremist who wants to take their SUV to the next level, this dual bolt on Cat back system is for you. This system exists behind the rear tires at an aggressive angle with a powerful exhaust tone outside and a calming note inside. You will gain bold street looks with powerful dyno tuned and tested street performance gains. You can expect to experience gains on average of 15 20 horsepower. Gibson muffler provides a mean performance sound and