Audio Enhancers CREW100X10 Chevrolet Subwoofer Box, X-Kote Finish Designed for 2007-2014 Chevy/ GMC Crew Cab1500, 2500HD and 3500HD Down Firing; Air Space 1.00cu.ft; Mounting Depth 5 11/16"; XKOTE; 1-10" Width 27 7/8" x Top Depth 17 3/4" x Front Height 9 1/8" x Rear Height 5 1/8" See Installation Comments Under Product Description 100% American Made & 100% Green