black 8" dual ported sub box, fits 14-18 chevy silverado crew-cab SPECIFICATIONS: -CUTOUT DIAMETER: 7 1/8” -NEED A CUSTOM CUTOUT (GIVE US A CALL) -AIR VOLUME: 1.76 FT3 -TUNING FREQUENCY: 34-Hz -1 PORT (DIMENSIONS: 4” X 13 1/2") -WEIGHT: 49 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 9 1/4” -REAR HEIGHT: 6 1/2" -LENGTH: 49" -DEPTH: 13 1/4" CONSTRUCTION: -3/4" HIGH QUALITY MDF WOOD -GLUE -2” STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -SEAT WILL NOT GO DOWN TO FACTORY HEIGHT -FITS UNDER REAR SEAT -FRONT FIRING NOT ALL SUBS WILL FIT DUE TO THE CUTOUT DIAMETER OR MOUNTING DEPTH SO PLEASE CHECK THE DIMENSIONS TO MAKE SURE THIS BOX SUITS YOUR SUBS