ASC Chevy C/K Silverado or GMC Sierra Fill Size Regular Cab Truck 1988-2006 Dual 12" Custom Fit Sub Box Speaker Enclosure Dimensions: Width 57-1/4" x Height 15-1/4" x Depth One 5-1/2" x Depth Two 8" Install Location: Behind Seat Install Notes: Fits trucks with or without center console Mounting Depth: 5-3/4 Inches Air Space: 1.98 Cubic Feet