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.
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. 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. These units come with a smaller pulley which requires installing a half inch to an inch shorter belt. Make sure to select the pulley design needed for your vehicle in the drop down menu.
All Motor Swap Applications will come with a 45 mm. 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 |
