(4) Rockville 8" Subwoofers+Sub Box Enclosure For 2007- CURRENT GM Crew Cab
(1) Rockville REC120 Quad 8" Ported Bedlined Sub Box For 2007- CURRENT GM Crew Cab. (4) Rockville K5 W8K5S4 8" 800w 4 Ohm Car Audio Subwoofer Sub 200w RMS CEA Rated! Rockville W8K5S4 K5 Series 8" 4-Ohm Car Subwoofer.