Audio Enhancers CREW120C10 Chevrolet Subwoofer Box, Carpeted Finish Designed for 2001-2005 Chevy/ GMC 1500HD/2500HD/3500HD Note Does not fit a non-heavy duty Forward Firing; Air Space1.20cu.ft.; Mounting Depth 5 15/32"; Carpeted 2-10" Width 49" x Height 10 1/4" x Front Height 5" x Rear Height 7 1/8" See Installation Comments Under Product Description 100% American Made & 100% Green