S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged This foil backed

This foil backed

while still maintaining great output at engine idle speeds

If applicable

FOR BEST RESULTS: Always thoroughly clean surface and heat both metal and sound deadening material before installation

S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged This foil backedThe S series of 6 phase alternators offers incredible low RPM output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure much better durability than standard Delco based alternators, even in severe conditions. This custom designed housing directly replaces standard Delco 10DN, 10SI and 12SI alternators on most 1963