Search by number: 1991 Oldsmobile 98 3.8L 6 Cyl Alternator ProAmp 7964-11 $72.00 each OPTIONS: wo/Supercharger wo/Heated Windshield 1st Prod ProAmp 7964-7 $76.00 each OPTIONS: wo/Supercharger wo/Heated Windshield 2nd Prod ProAmp 7984-2 $99.00 each OPTIONS: wo/Supercharger w/Heated Windshield 3rd Prod ProAmp 7984-7 $143.00 each OPTIONS: wo/Supercharger w/Heated Windshield 1st Prod ProAmpN 7964-11N $109.00 each OPTIONS: wo/Supercharger wo/Heated Windshield 1st Prod ProAmpN 7964-7N $111.00 each OPTIONS: wo/Supercharger wo/Heated Windshield 2nd Prod ProAmpN 7984-7N $147.00 each OPTIONS: wo/Supercharger w/Heated Windshield 1st Prod ProAmpN 7984-2N $147.00 each OPTIONS: wo/Supercharger w/Heated Windshield 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