Available in a set of 12 under 503-12, available in a set of 16 under 503-16
COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 503 seal has a .630" outer diameter and fits applications with 11/32" valves and .530" OD valve guides.
Fits: 11/32" Valve Stems - .530" Guides (.630" Seal Diameter)Valves Seals keep unwanted oil from entering the combustion chamber through clearance in the valve guidesSmaller diameter than COMP Umbrella Seals to allow use with double springs
