ASC Nissan 350Z Coupe 2003-2008 Dual 12" Subwoofer Custom Fit Hatch Sub Box Speaker Enclosure Dimensions: Width 41-3/4" x Height 9-3/4" x Top Depth 18" x Bottom Depth 14-3/8" Install Location: Behind Seat in Trunk Install Notes: Does Not fit Convertible Mounting Depth: 7-5/8 Inches Air Space: 1.10 Cubic Feet