S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L The 170 amp unit comes

The 170 amp unit comes equipped with an OEM diameter pulley

Here is why we use Logarithmic

this unit is not recommended for use over 5

Anything less than 200'

This makes it a perfect solution for customers running stand alone EFI harnesses

S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L The 170 amp unit comesThe S series of 6 phase hairpin 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. A side