COMP Cams · New
COMP Cams Valve Seals 11/32in Metal W/Pt
MPN 503-12 · Store SKU cca503-12
Supplier stock checked 11/7/2026, 6:42:55 PM UTC. Adding a part does not reserve it.
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Product details
COMP Cams offers a complete line of valve stem Seals, from the stock GM "O-Ring" to the positive-stop PTFE Seal. These Seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The "O-Ring" Seals use the standard retainer and oil splash shield. The umbrella Seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop PTFE Seal is used. We also have a smaller diameter Viton Seal available for triple spring Applications. COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 503 seals have a .630" outer diameter and fit applications with 11/32" valves and .530" OD valve guides. Set of 12 PTFE Valve Seals for .530" Guide Size, 11/32" Valve Stem
Manufacturer fitment & guides
- Engines w/ 0.530" OD Valve Guides and 11/32" Valve Stems
- Manufacturer-supplied application summary from Turn14; this may not be an exhaustive fitment list.
Part-specific notes
- California Proposition 65: Y
