S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L This makes it a perfect

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

this tried-and-true alternator features 16 diodes for excellent durability

75 inch diameter pulley on this unit is ideal for maximizing amperage capability at engine idle RPM

Air gaps between Damplifier Pro and the application surface will severely reduce damping performance

this unit is not recommended for use over 5

S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L This makes it a perfectThe 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