COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 500 seal has a .630" outer diameter and fits applications with 5/16" valves and .530" OD valve guides.
Available in a set of 12 under 500-12, available in a set of 16 under 500-16
Engines with 0.530" OD Valve Guides and 5/16" Valve Stems
