Engines and Components› Cylinder Heads and Components
COMP Cams
Umbrella Seals Stock Guide 3/8" Valve
SKU: C007 504-12
Easy — 1–2 hours
Description
Part #: 504-12
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.
Typically requiring no machine work, our 504 umbrella seals are a great option for stock guide applications with 3/8" valves needing a seal replacement.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
MIA's Description
These umbrella seals are typically used when a larger-than-stock diameter spring is employed. For double spring applications, positive-stop PTFE seals are recommended, while triple-spring applications may require smaller-diameter Viton® seals. The seals have an outer diameter of 0.900 inches and are made of rubber.
Fitment
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Specifications
| Brand | COMP Cams |
| Part Number | C007 504-12 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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