DescriptionWe choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high temperature areas, which promotes high performance and endurance. KPMI® Guide Sizing Tool Flyer DownloadClick HereKPMI® Seal Catalog DownloadClick HereQuantityPkg. of 1MaterialC630 BronzeTypeIntakeOutside Dia.: (G)0.3765″ / Std.B0.460″C0.655″D1.015″E0.374″F0.1764″