Change valve springs with the head(s) on the engine. Handle provides leverage to compress almost any spring. Works on Chevrolet, Ford, Pontiac or any other engine with a stud mounted rocker system. Use with JEGS air hold adapter 555-80522.

Features:
• Compresses valve springs without removing head.
• Allows access for service to most valve train components.
• For GM 8 cylinder engines and others with stud type rocker arms.