CHE Precision Inc

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For the serious racer, CHE Precision offers an XP ( Extra Precision ) series valve guide, which is used by the industry's top racing teams. These are made from a special formulation of HT Bronze, developed from over 25 years of extensive research and experience in the racing industry. This particular bronze was specifically developed to provide extended wear properties and extraordinary heat dissipation. The ID ( Internal Diameter ) is a 10Ra, or better, finished with a burnished surface. All of the XP guides are OD ( Outer Diameter ) ground by locating the guides in their ID. The XP series is guaranteed to be concentric to within 0.0005 inch or better. What we're talking about here is a most amazing, state of the art product that has been carefully designed to be the perfect combination of quality materials and precision craftsmanship, unmatched anywhere throughout the industry. A worn guide can be removed from the cylinder head and a new guide installed with minimal work, usually by just guide honing and kissing the valve seat with a fresh valve job. CHE also manufactures steel valve guides primarily used in the drag racing market ( Top Fuel ).