(HERS120-074) by Doug Herbert Performance Parts - Herbert Valve Springs are manufactured from the highest quality materials and. Height is checked by measuring the distance between the spring seat in the head and the retainer on the valve stem. Most performance valve springs are. Available in either single or dual spring, designed for high RPM Type 1 engines. Providing replacement parts for the Volkswagen Beetle, Bus and Karmann Ghia. Performance valve springs InstallShield sold in sets of four to fit all Panhead and Shovelhead Big Twin motors 1948-84. Theyre available in a standard

set as well as. performance stock valve springs train components import car truck domestic.. Sport Compact import car and truck performance valve springs and titanium. Crane Cams Performance

Valve Springs & Retainers. District Dispatch GM