Fits 2021-2023 Toyota Tacoma Double Cab Forward Firing Design - Fits Behind Seat Center of Box Can Be Used for Amp Mounting Plastic Trim Behind Seat Needs Removal Brackets on Cab Wall Needs Removal Speaker Grills Recommended Hole cutout for 8" Sub: 7 1/8" Hole cutout for 10" Sub: 9 1/8" Subwoofer Mounting Depth: 5.375" (optional 6 .00") Mounting Depth based on 6.00" diameter magnet Subwoofer Airspace: Approx. 0.60 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 Alpine R subs will not fit due to it's large magnet/casting 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.