Pioneer SS-555-HD
Valve spring lock / keeper kit for selected classic GM, Ford, Jeep, Lincoln, Mercury, and Pontiac engines.
Pioneer SS-555-HD is a valve spring lock kit for selected classic American engines. Valve locks hold the spring retainer to the valve, so they must match the valve groove, retainer, and spring.
Application / fitment
Catalog data places SS-555-HD in a broad range of selected American Motors, Buick, Cadillac, Chevrolet, Ford, GMC, Hummer, Jeep, Lincoln, Mercury, Oldsmobile, and Pontiac applications. Coverage includes selected Ford 4.7 / 289, 5.0 / 302, 5.8 / 351C / 351W, 7.5 / 460, and selected GM 5.0 / 305, 5.7 / 350, and 6.6 / 403 engines.
- part type: valve spring locks
- selected classic GM, Ford, Jeep, Lincoln, Mercury, and Pontiac engines
- example engines: Ford 4.7 / 289, 5.0 / 302, 5.8 / 351, 7.5 / 460; GM 5.0 / 305, 5.7 / 350, 6.6 / 403
- application: valve spring retainer attachment
Before installation, verify lock angle and style, valve stem diameter, and retainer compatibility. When mixing new and existing valvetrain parts, installed spring height must be checked.
Technical information
- part type: valve spring locks
- type: engine valve spring retainer keeper kit
- application: valvetrain
- sale unit: 1 kit