| Valve head seat, for blocks that are wornAdditional Information Valve head seat, heat treated and hardened steel. For blocks that are worn from years of grinding the valves in. Can be used with unleaded gas. Block has to be machined to install. The outside diameter of this seat is 1.628" and it is .215" tall. Questions and Answers To ask a question about this item please press and fill out the form. Customers Who Bought This Item Also Bought | |