Single Hi-Rev Valve Springs – 40hp – later
Aircooled VW Hi-rev Valve Springs
Made of specially processed spring steel to insure against breakage and fatigue. Increases valve tension without increasing seat pressure for maximum valve control at all RPM’s. Replaces original parts perfectly. A must for all high-performance engines. Sold in sets of 8.
Installed height of 1.500″ gives you @ 120 lbs. of seat pressure,
and @ .500” lift you have an open load of 220 lbs.