Search by number: 1991 Mercury Tracer 1.8L 4 Cyl Alternator ProAmp 13314 $68.00 each OPTIONS: 1st Prod To 11/90 ProAmp 13350 $90.00 each OPTIONS: 2nd and 3rd Prod ProAmpN 13314N $147.00 each OPTIONS: 1st Prod To 11/90 ProAmpN 13350N $163.00 each OPTIONS: 2nd and 3rd Prod 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