Audio Enhancers CREW180C12 Chevrolet Subwoofer Box, Carpeted Finish Designed for 2007-2015 Chevy/ GMC Crew Cab 1500, 2500HD and 3500HD Down Firing; Air Space 1.80cu.ft; Mounting Depth 5 11/16"; Carpeted 2-12" Width 51" x 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