S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged these units use less horsepower

these units use less horsepower per Kw produced than conventional 3 phase alternators

Features: (shown in product pictures)

while still maintaining great output at engine idle speeds

725 Strands

No problem - our turn-on relay kits are designed to allow you to easily interface all of their turn-on circuits to your source unit

S Series 240A alternator - 63-85 GM - 1 wire - Polished 3.8L Supercharged these units use less horsepowerThe 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