COMP Cams Positive Stop Valve Stem Seal - 3/8 in Valve Stem - 0.500 in Guide - Steel Body / Viton - Set of 16 521-16 29020BK GM / Ford / Lincoln

GM / Ford / Lincoln / Mercury

Drill Bit / Guide / Tap

Aluminum stand simplifies carb maintenance and will hold carb off of workbench surface

including GM

but with a more rigid wheel and Bead-Loc design to hold up to the rigors common to East Coast Modifieds

COMP Cams Positive Stop Valve Stem Seal - 3/8 in Valve Stem - 0.500 in Guide - Steel Body / Viton - Set of 16 521-16 29020BK GM / Ford / LincolnProviding the best sealing properties and spring clearance, Viton valve seals are an excellent choice in performance applications. The 521 seals have a . 545" OD and fit applications with 3 8" valves and . 500" OD 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 happens out on the