The Q-Power 12" Q-Bomb Sub Box Enclosure is custom made for GMC and Chevy Silverado Crew Cab Trucks, model year 2007 to 2013. This enclosure is designed to fit underneath the rear seats and boasts .90 cubic feet of air space. The Q-Power 12" Q-Bomb subwoofer box is finished with a black bedliner spray for increased durability. Turn your ride into a sound machine with the help of the Q-Power 12" Subwoofer Enclosure! If you want the most output for your money, this is the way to go. Designed and Built for the Deepest Bass Dimensions: 50.5" (W) x 16" (H) x 5"-9" (Top D-Bottom D)