Amazon.com: HA-R68 Compatible with Ford F-250/350/450/550/650/750 1999-2004 Car Stereo Rhythm Series 5x7 6x8 Replacement 225W Speakers and HA-725600 Speaker Replacement Harnesss : Electronics
Metra Speaker Wire Harness Adapter for Most 1999 or Later Ford Trucks Black 72-5600 - Best Buy
1999-2004 Ford F-250 and F-350 Super Duty
Dual 6.5" (D6) Speaker Pods for 1999-2007 Ford Excursion - Custom Speaker Pods
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Amazon.com: Alpine R 6x8 Front+Rear Speaker Replacement for 1999-2004 Ford F-250/350/450/550 : Electronics
Ford Super Duty Standard Cab Sub Box F250 Sub Box F350 Sub Box