ASC Chevy Colorado or GMC Canyon Crew Cab Truck 2004-2012 Dual 10" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Front Width 42-1/4" x Bottom Width 32-1/4" x Height 4-1/2" x Depth 12-1/4 Install Location: Under Rear Seat Install Notes: Box Installs easier if seat is removed during installation Mounting Depth: 3-1/2 Inches Air Space: 0.66 Cubic Feet