S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged It comes with a bass

It comes with a bass knob and a clipping indicator

while still maintaining great output at engine idle speeds

725 Strands

Comes equipped with lock and spring for ease of use

S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged It comes with a bassThe 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