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  1. DeSotohead

    What valve seat material for Titanium Valves.

    The new Corvette engine (the 7.0L Gen-IV smallblock) is using a material for the Titanium intake valves (manufactured for GM by DelWest) called PMF-28. Has anybody heard of this material, what its composition is, and where possibly to get it? I cannot believe that GM would be using BeCu due to...

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