Holley Alternator 197-303
Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303 Holley Alternator 197-303

Holley Alternator 197-303

$564.99 ea
Condition: NEW
Estimated arrival: 11/09/2021 (If Ordered Today)
6 available from HOLLEY PERFORMANCE PRODUCTS as of 10/25/2021
Supplier has not provided any fitment data for this product.
Shipping Note:Standard Delivery

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We'll find it for you. Give us a call at 855.444.6872 and we'll source that discontinued or hard to find part.

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No Brokerage or Duties - Canadian Owned & Operated - Shipped from Canada to your Door - Easy to Navigate Website - Access to New, Used & Discontinued Parts - Full Time Staff to Answer your Questions.


Muscle Cars & Classics always recommends professional installation of our products. Buyer assumes risk of damage caused by improper installation.

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 W/All Holley Accessory Brackets
  • 150 AMP Output
  • Smaller and Larger Than The Larger Case
  • Sculpted All Aluminum Housings
  • Use When Size and Clearance Matter
  • Made In The USA
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations

About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!


Download Name File Size


Alternator Style O.E. or 1-wire
Amperage 150 AMP
Emission Code 5
Engine GM Small Block Gen III/IV (LS Based)
Engine Make/Size GM LS
Finish Black
Material Aluminum
Output 150 Amps
Part Type Alternator
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm

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