Holley's premium alternator is built to tolerate 30% higher RPM than a conventional alternator, with a sculpted all-aluminum housing and cast internals engineered for cleaner, more efficient output. Made in the USA, it uses the same core technology GM adopted for the 2014-and-later Corvette, wrapped in a housing that polishes clean without buffer marks in tight corners.
Specifications:
- Alternator Style: O.E. or 1-Wire
- Engine: GM Gen III/IV (LS)
- Material: Aluminum
- Finish: Natural, Internal Finish Cast
- Output: 150 Amps
- Pulley: Serpentine, 6-Groove
- Ground: Negative
- Product Type: Alternator
- Category: Electrical, Charging and Starting
- Sub Category: Alternator / Generator and Related Components
- Warning: California Proposition 65
- Part Number: 197-302
Fits all Holley accessory brackets, plus 4th generation F-body and most 1998-2004 GM trucks. Black and polished pulley covers are available separately (97-187 black, 97-188 polished), and a weatherproof plug/pigtail (197-400) is needed but not included.
FAQ
What output does the 197-302 alternator produce?
150 amps, in a smaller and lighter case than Holley's large-case 197-301.
What vehicles does it fit?
All Holley accessory brackets, 4th generation F-body, and most 1998-2004 GM trucks.
Is a plug/pigtail included?
No — it uses weatherproof plug/pigtail part number 197-400, sold separately.
Can I get a pulley cover to match?
Yes, black (97-187) and polished (97-188) pulley covers are available separately.
