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Vehicle Info NeededHOLLEYPART NUMBER: 510-197-304
197-304 Premium Alternator
$69995
Ships on 09/08/2026
Lowest Price GuaranteeGM
Premium AlternatorGM LS Series Engines 150 Amp Output Includes Polished Pulley Cover Polished Finish
Holley 197-304 Features:
With performance engines pushing redlines up higher and higher, alternators are being forced beyond their design. Holley's premium alternators are specially designed to tolerate 30% higher RPMs than conventional alternators and made in the USA. If you drag race, auto-cross, or just hot-rod your ride, know this alternator won't fly apart on you. Inside the attractive Holley housing is cutting edge technology. Every component was developed to produce cleaner, more efficient output compared to conventional alternators. Efficiency means you get more from a compact package. GM recently adopted this technology for the 2014 and later Corvettes. The attention to cosmetic detail on these units is above and beyond what you would expect too. The entire outside housing has been sculpted for a smooth silhouette that hides the ugly details we think of as alternators. The housings are smoothed to make polishing clean (no buffer cut marks trying to get in tight corners). Even the rear cover is aluminum so you lose that black plastic on your polished alternator. Available in Natural, black, and polished finishes. For that finishing touch, black pulley covers are available to give a simple but refined look on the 197-302 and 197-303. The 197-304 polished alternator already includes a polished cover. These powerhouses fit ALL Holley accessory brackets, as well as 4th generation F-body, most 1998 thru 2004 GM trucks, and many other applications.- Works with ALL Holley accessory brackets
- 150 Amp Output
- Smaller & Lighter than the large case 197-301
- Sculpted all aluminum housings
- Use when size and clearance matter
- Made in the USA
- Black and polished pulley covers are available: P/N 97-187 (Black) & 97-188 (Polished)
- Uses weatherproof plug/pigtail P/N 197-400 (not included)
High Amperage Alternators
Holley Premium Alternators are available for all Holley accessory drive systems and many factory drive systems, making them the perfect choice for your engine swap.
Part TypeAlternator
Product LineHolley Premium Alternators
BrandHOLLEY
Package Height9.5
Package Width9.5
Package Length10.1
Weight14.38 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number197-304
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
