COMP Cams Teflon Valve Seals - 3/8 w/ .500 Guide 2010205 Due to the increased load

Due to the increased load capacity of the Tri-Metal design

Crimping Tool

a pair of snap ring pliers

GM/Mercury Marine Big Block V8 Gen-IV/V/VI

COMP Cams Teflon Valve Seals - 3/8 w/ .500 Guide 2010205 Due to the increased loadCOMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than O ring or umbrella seals. These 512 seals have a . 600" outer diameter and fit applications with 3 8" valves and . 500" OD valve guides. The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development. One thing COMP Cams has never forgotten: Performance is defined by what