COMP Cams 519-12 Valve Seals, 5/16 Viton Metalbody W/.500

Description

Valve Seals, Positive Stop, Viton®, 0.313 in. Stem, 0.500 in. Guide, Designed for Triple Spring, Set of 12
Brand: COMP Cams
Manufacturer's Part Number: 519-12
Part Type: Valve Stem Seals
Product Line: COMP Cams Valve Seals
Valve Stem Diameter (in): 0.313 in.
Valve Stem Diameter (mm): 7.95mm
Valve Stem Seal Type: Positive stop
Valve Stem Seal Material: Viton®
Machine Work Required: No
Valve Guide Diameter (in): 0.500 in.
Valve Stem Seal Outside Diameter (in): 0.500 in.
Quantity: Sold as a set of 12.
Notes:Designed for triple spring. Requires machining the top of the valve guide with a special .500 in. diameter cutter.
COMP Cams offers a complete line of valve seals, from the stock GM O-rings to the positive-stop PTFE seals. They 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 seals are normally used when a larger-than-stock diameter spring is used. In the case of a double spring, the positive stop PTFE seals are used. For triple-spring applications, use the smaller-diameter Viton® seals.