Search by number: 2003 Ford F Series Pickups 6.0L 8 Cyl Diesel Alternator ProAmp 8306 $137.00 each OPTIONS: Standard Single Alt System ProAmp 8307 $153.00 each OPTIONS: Optional Dual Alt Pkg Primary Unit ProAmp 8308 $157.00 each OPTIONS: Optional Dual Alt Pkg Auxiliary Unit ProAmpN 8308N $186.00 each OPTIONS: Optional Dual Alt Pkg Auxiliary Unit ProAmpN 8307N $212.00 each OPTIONS: Optional Dual Alt Pkg Primary Unit ProAmpN 8306N $222.00 each OPTIONS: Standard Single Alt System Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator