S Series 170a racing alt - 63-85 GM - 1 wire - Polished 4.3L 120 of an inch or

120 of an inch or 3 mm total thickness)

Thick black foil with metallic blue/purple logos

this unit is not recommended for use over 5

Sensitivity: 90dB

S Series 170a racing alt - 63-85 GM - 1 wire - Polished 4.3L 120 of an inch orThe 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