Search by number: 2003 Ford Explorer 4.6L 8 Cyl Alternator ProAmp 7773 $121.00 each OPTIONS: Standard 130 Amp ProAmp 7773HD200 $274.00 each OPTIONS: 200 Amp; Custom Built ProAmpN 7773N $157.00 each OPTIONS: Standard 130 Amp 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