COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 513 seal has a .600" outer diameter and fits applications with 5/16" valves and .500" OD valve guides.
Available in a set of 12 under 513-12, available in a set of 16 under 513-16
Engines w/ 0.500" OD Valve Guides and 5/16" Valve Stems
