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COMP Cams Viton valve seal for GM LS1 specified as .313 x .500 is offered for LS applications where improved sealing and spring clearance are desired. The 511 Viton seal has a .600" outer diameter and is intended for LS engines using 8mm valves with .500" OD guides, delivering a balance of sealing performance and compatibility for those guide dimensions.
COMP Cams Valve Seal Viton GM LS1 .313
