12SI Racing High Output Alternator - One Wire Turn On

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional...
JS Alternators Art: 8302-250-799
Amperage
Pulley
    $399.00 $499.00
    $399.00
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators
    12SI Racing High Output Alternator - One Wire Turn On JS Alternators

    12SI Racing High Output Alternator - One Wire Turn On

    12SI Racing High Output Alternator - One Wire Turn On JS 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 your racing applications

    This unit is a direct replacement for standard Delco 10DN, 10SI, and 12SI alternators, making it easy to install on most 1963-1985 GM vehicles. This direct replacement makes for an easy installation! To activate the alternator, you only need to connect a single wire from the provided pigtail to any ignition switched 12V+ source. This allows the alternator to turn on and off with the ignition switch. This unit is for a racing application, be sure to select what pulley design is needed for your vehicle in the drop down menu. Every 250amp alternator will automatically come with the OEM size pulley unless specified in your order notes.

    All 12SI Applications will come with a 45 mm. (or 58mm for V Belt) pulley and will require installing a 1/2 inch - 1 inch shorter belt.

    Fitment Guide:

    Make Model Engine Year(s)
    BUICK All Early Models Most Engines 63-79
    BUICK Gran Sport All Engines 65-67
    BUICK Riviera All Engines 63-70
    BUICK Skylark All Engines 63-79
    BUICK Wildcat All Engines 63-70
    CADILLAC All Early Models All Engines 63-85
    CHEVROLET All Early Models Most Engines 63-85
    CHEVROLET C10 Pickup All Engines 63-78
    CHEVROLET Camaro All Engines 67-80
    CHEVROLET Caprice All Engines 66-77
    CHEVROLET Chevelle All Engines 64-73
    CHEVROLET Chevy II All Engines 63-68
    CHEVROLET Corvette All Engines 63-79
    CHEVROLET El Camino All Engines 64-77
    CHEVROLET Impala All Engines 63-77
    CHEVROLET Malibu All Engines 64-77
    CHEVROLET Monte Carlo All Engines 70-77
    GMC All Early Models All Engines 63-85
    GMC C15 Pickup All Engines 67-78
    OLDSMOBILE All Early Models V-8 63-85
    OLDSMOBILE 442 All Engines 65-71
    OLDSMOBILE Cutlass All Engines 63-76
    OLDSMOBILE F85 All Engines 63-72
    PONTIAC Early models V-8 63-85
    PONTIAC Firebird All Engines 67-70
    PONTIAC GTO All Engines 64-71
    PONTIAC Tempest All Engines 63-70
    PONTIAC Ventura All Engines 71-77

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