1999 + NEWER GENERAL MOTORS FULL SIZE PICKUP W/EXTENDED CAB (NOT 4 DOOR) DUAL 12″ UNDER SEAT DOWN-FIRING WOOFER BOX 5/8″ MDF CHARCOAL CARPET 51″ WIDE x 7″/9.75″ HIGH (TAPERED) x 15.25″/14.25″ TOP/BOTTOM DEPTH WOOFER MOUNTING DEPTH: 5.5″ AIR SPACE = 0.95 CU. FT. PER CHAMBER
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