C630 nickel bronze is used as the material to make these valve guides because of its ideal characteristics for the application
The 4-5 percent nickel content provides superior resistance to wear and the approximately 80 percent copper content delivers outstanding heat conductivity
Guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high temperature areas promoting high performance and endurance
The top portion of the guides were shortened when cam lift information available at the time of design showed that additional retainer to seal clearance was required
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