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 alternator is a direct fit for your LS engine swap and 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. These units come with a smaller pulley which requires installing a half inch to an inch shorter belt.
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 Size | Year |
|---|---|---|---|
| Buick | Rainier | 5.3L | 2004 – 2006 |
| Cadillac | Escalade | 5.7 / 6.0 / 6.2 | 1999 – 2004 |
| Chevrolet | Astro Van | 4.3L | 1996 – 2005 |
| Chevrolet | Avalanche | All Engines | 2002 – 2004 |
| Chevrolet | Camaro | 5.0 / 5.7 | 1998 – 2002 |
| Chevrolet | Express Van w/4 pin plug | 1996 – 2016 | |
| Chevrolet | Full Size Truck | All Gas Engines | 1996 – 2004 |
| Chevrolet | Full Size Truck | 6.6L Duramax | 2001 – 2007 |
| Chevrolet | S-10 / Blazer | 4.3L | 1994 – 2004 |
| Chevrolet | SSR | 5.3 / 6.0 | 2003 – 2006 |
| Chevrolet | Suburban | w/4 pin plug | 1996 – 2004 |
| Chevrolet | Tahoe/Full Size Blazer | All Gas Engines | 1996 – 2004 |
| Chevrolet | Trailblazer | 5.3L | 2003 – 2006 |
| GMC | Envoy | 5.3L | 2003 – 2006 |
| GMC | Full Size Truck / Sierra | 4.3L | 1996 – 2004 |
| GMC | Full Size Truck / Sierra | 4.8L | 1999 – 2004 |
| GMC | Full Size Truck / Sierra | 5.0L | 1996 – 1999 |
| GMC | Full Size Truck / Sierra | 5.3L | 1999 – 2004 |
| GMC | Full Size Truck / Sierra | 5.7L | 1996 – 2000 |
| GMC | Full Size Truck / Sierra | 6.0L | 1999 – 2005 |
| GMC | Full Size Truck / Sierra | 6.6 Diesel | 2001 – 2006 |
| GMC | Full Size Truck / Sierra | 7.4L | 1996 – 2000 |
| GMC | Full Size Truck / Sierra | 8.1L | 2001 – 2005 |
| GMC | Safari | 4.3L | 1994 – 2004 |
| GMC | Savana Van | w/ 4 pin oval plug | 1996 – 2016 |
| GMC | Suburban | w/ Oval plug | 1996 – 2004 |
| GMC | Yukon | w/ Oval plug | 1996 – 2004 |
| Hummer | H2 | 6.0L | 2003 – 2007 |
| Oldsmobile | Bravada | 4.3L | 1994 – 2001 |
| Pontiac | Firebird | 5.0 / 5.7 | 1998 – 2002 |
