Reviewed By John W (Sterling, IL) Reviewed for a 2017 GMC Sierra —3/16/2018 9:00 PM
Installed this kit last week into my new Sierra Denali HD Crew Cab. I did the full system and did not retain the resonator so I could get the full performance benefits. Fairly easy to install but the fitment wasn't perfect to the body with the new air box......had to ease off the intake Hose@ the filter 1/2" to get it to seal @ fender I noticed right off the bat that the truck seemed to fire up quicker upon startup. Haven't had it long enough to determine hp/mileage gains.