S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L this unit is not recommended

this unit is not recommended for use over 5

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

The 170 amp unit comes equipped with an OEM diameter pulley

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

S Series 240 amp "one wire" alternator for 1963-1985 GM - BLACK 6.1L this unit is not recommendedThe 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