Fits 2004 & Older Toyota Tacoma Double Cab Forward Firing Design - Fits Behind Seat All Hardware on Cab Wall Must be Removed Speaker Grills Recommended Hole cutout for 8" Sub: 7 1/8" Subwoofer Mounting Depth: 4.00" (Shallow Mount Subs Recommended) Mounting Depth based on 5.00" diameter magnet Subwoofer Airspace: Approx. 0.35 cubic ft. Per Sub/Side Made with 0.625" MDF Speaker Wire Terminals: 1 Per Subwoofer Box Type: Sealed Box Box Finish - Carpet Subwoofers & Amps Not Included Hole Cutouts adjustable per request Subwoofer Mounting depth based on the most common size subwoofers. Some Subwoofers with oversized framing/magnets may not fit without modification. If you're using a subwoofer that is close to the max specs please contact us for fitment confirmation.