- Holley Premium Alternator provides up to 150 amps of charging capacity in a compact, lightweight package designed for high-performance and high-RPM environments
- Built to withstand rotational speeds up to 30% greater than many standard alternators
- More compact and lighter than the large-case 197-301 model, while remaining compatible with all Holley accessory brackets, 4th generation F-Body setups, and most 1998–2004 GM truck applications
- Proudly manufactured in the USA with precision-machined, all-aluminum housings for enhanced strength and stable electrical output
- Features a sleek outer profile and an aluminum rear cover in place of typical plastic components for added durability
- Offered in natural, black, or polished finishes, with optional pulley covers available; requires weatherproof plug or pigtail P/N 197-400 (sold separately)
- Covered by a 1-Year Limited Warranty
Performance engines that live at higher RPM require charging systems built to withstand the added stress. From drag strip launches to tight autocross courses or spirited street driving, dependable electrical output is essential. The Holley Premium Alternator is designed to provide consistent charging power while complementing the look of a well-detailed engine bay.
Engineered to operate at rotational speeds up to 30 percent greater than many standard alternators, this unit is well suited for engines that regularly see elevated redlines. Manufactured in the USA, it produces 150 amps of output in a more compact and lighter configuration compared to larger case alternatives such as 197-301. It is compatible with Holley accessory bracket systems, 4th generation F-body applications, most 1998–2004 GM trucks, and a variety of other setups. The alternator features contoured, all-aluminum housings designed to promote efficient performance and dependable output.
Designed with both function and appearance in mind, the streamlined exterior eliminates the oversized look common to many factory-style units, and an aluminum rear cover replaces typical plastic components for added durability. Finish options include natural aluminum, black, and polished, with optional black or polished pulley covers available separately. The polished 197-304 version includes a polished pulley cover from the factory. A weather-sealed plug or pigtail (P/N 197-400) is required for installation and is not included. Backed by a 1-Year Limited Warranty.