Search by number: 1981 Jaguar XJ12 5.3L Alternator ProAmp 14054 $112.00 each OPTIONS: Lucas Unit To Mid 1981 ProAmp 14092 $153.00 each OPTIONS: Lucas Unit From Mid 1981 ProAmp 14068 $153.00 each OPTIONS: Motorola Unit To Mid 1981 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