Gibson 07-12 Chevrolet Avalanche LS 5.3L 2.25in Cat-Back Dual Extreme Exhaust - Aluminized Exterior Styling>Bumper Covers - Front The factory mass air flow

The factory mass air flow sensor and crank case breather hose mount directly to the intake tube

The 270" dialface together with the new white LED backlighting and illuminated needle ensure excellent readability day or night

All diaphragms endure a four-stage

The lightweight tube is computer-designed to achieve maximum power gains while maintaining a perfect fit

Gibson 07-12 Chevrolet Avalanche LS 5.3L 2.25in Cat-Back Dual Extreme Exhaust - Aluminized Exterior Styling>Bumper Covers - Front The factory mass air flowFor the extremist who wants to take their truck 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. 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 complemented with polished