Search by number: 2015 Ford Focus ST 2.0L 4 Cyl Alternator ProAmp 11551 $166.00 each OPTIONS: Mitsubishi type unit 150 Amps 4 Groove Serpentine Belt Focus ST ProAmp A2TX2581 Call for Price OPTIONS: OEM Mitsubishi Unit 150 Amps 4 Groove Serpentine Belt Focus ST 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