Rockville
Dual 10" Subwoofer Sub Box Enclosure for 00-03 Ford F150 Xcab UnderSeat Downfire
Q Power
QPower 8 inches Quad Port Subwoofer Enclosure Box, with Underseat Frontfire for Ford F150, Super Crew and 250 350 Super Duty Trucks
Rockville
Rockville UnderSeat Downfire Dual 12" Subwoofer Sub Box for 2000-2003 Ford F150 Xcab
American Sound Connection
American Sound Connection Dual 12 Subwoofer Bass Speaker Sub Box Compatible with 1997-1999 Ford F150 Ext Cab Truck