GM Racing High Output Alternators

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin units feature premium bearings to withstand high engine rpm and utilize dual plate rectifier with 12 heavy duty diodes for improved cooling. Hairpin Units are a more reliable alternator to withstand high heat, high demand for car audio, marine, and racing applications.
the 170 and 250amp performs great down to 500rpm.
the 320amp performs great at 750rpm or higher.
*When ordering select A for v-belt or B for serpentine belt. These units are 12 and 6 oclock mounts.