ASC Chevy Trailblazer or GMC Envoy 2002-2009 Single 12" Subwoofer Custom Fit Sub Box Speaker Enclosure Dimensions: Bottom Width 24-1/4" x Top Width 11" x Height 13-1/2" x Depth 6-5/8" Install Location: Rear of vehicle (Passenger side) Install Notes: No Modifications Required Mounting Depth: 6-1/4 Inches Air Space: 0.80 Cubic Feet