Photo 1 of 1999-2006 Silverado/Sierra Extended Cab Dual 12 Downfire Ultra MAXX Subwoofer Box

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Photo 1 of 1999-2006 Silverado/Sierra Extended Cab Dual 12 Downfire Ultra MAXX Subwoofer BoxPhoto 2 of 1999-2006 Silverado/Sierra Extended Cab Dual 12 Downfire Ultra MAXX Subwoofer BoxPhoto 3 of 1999-2006 Silverado/Sierra Extended Cab Dual 12 Downfire Ultra MAXX Subwoofer BoxPhoto 4 of 1999-2006 Silverado/Sierra Extended Cab Dual 12 Downfire Ultra MAXX Subwoofer Box