BLACK 8" SEALED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 7 1/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 8" PORTED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 7 1/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 8" SEALED SOLO BARIC DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 7 3/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 10" SEALED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 9 1/4" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 10" PORTED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 9 1/4" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 10" SEALED L7T DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 9 3/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 12" SEALED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 11 1/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION BLACK 12" PORTED DUAL SUB BOX, FITS CHEVY SILVERADO EXTENDED & DOUBLE CAB 2007-2018 SPECIFICATIONS: -CUTOUT DIAMETER: 11 1/8" -TOTAL AIR VOLUME: 1.26 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.63 CUBIC FT. -WEIGHT: 37 LBS. -MOUNTING DEPTH: 6 1/4" DIMENSIONS: -FRONT HEIGHT: 10 3/4" -REAR HEIGHT: 7 1/4” -LENGTH: 55 1/2" -DEPTH: 13 1/2" CONSTRUCTION: -5/8" MDF WOOD -GLUE -2" STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS UNDER REAR SEAT -DOWN FIRING -2007 FITS ONLY THE NEW BODY STYLE -SUBWOOFERS WITH WIDE MAGNETS/BASKETS MAY NOT FIT -2014-2018 BACK SEAT MAY NOT GO DOWN TO ORIGINAL POSITION 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