Howards Max Effort™ Dual Racing Valve Springs - O.D.: 1.470", I.D.: .800"

Coiled and heat-treated in the finest facilities available. Howards research and development teams are constantly updating materials and manufacturing techniques, to provide the best possible valve springs. Howards Cams pioneered many valve spring developments since the 1950's, and are still working with the best engineers and race teams to be on the cutting edge of valve spring technology.