2014-2016 Chevy Silverado / GMC Sierra Double Cab Dual 10 Downfire Subwoofer Box Fits 2014-2018 GM Double Cab Trucks Holds Two 10" subs and Fires down Mounting Depth: 5.5", Volume: .6 cu.ft. per chamber sealed. No modifications to the vehicle are required, unit drops in and seat locks it into place Comes with Charcoal Gray Carpet (slightly different than shown). Speaker Terminals Installed for Easy Hook-Up