Seller notes

Black Diamond Intake Valve Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems All valve guides are made of Ampco-45, a high-performance compound with 80% copper for great heat conductivity and 4-5% nickel for wear resistance Spring sets contain springs and titanium upper collars; keepers and lower collars inclu...

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