Search by number: 2010 Ford E-450 Super Duty 6.0L 8 Cyl Alternator ProAmp 8445 $129.00 each OPTIONS: Single Alt system 110 Amps ProAmp 8307 $153.00 each OPTIONS: Top Unit Dual or Single alt system 135 Amps ProAmp 8477 $170.00 each OPTIONS: Bottom unit Dual Alt system 120 Amps ProAmpN 8445N $204.00 each OPTIONS: Single Alt system 110 Amps ProAmpN 8307N $212.00 each OPTIONS: Top Unit Dual or Single alt system 135 Amps ProAmpN 8477N $214.00 each OPTIONS: Bottom unit Dual Alt system 120 Amps 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