20-21020 KPMI, intake valve guide. C630 bronze. STD

These Kibblewhite intake valve guides are crafted from C630 bearing bronze, a high-performance nickel-aluminum-bronze alloy favored for its exceptional heat transfer properties. This standard-sized guide is designed for 2017 to 2023 Milwaukee-Eight models and features a 0.4750-inch outer diameter, a 0.2347-inch inner diameter, and a 1.655-inch overall length. In racing and high-performance applications, the ability to quickly move heat from the valve to the cylinder head is critical for longevity, and C630 bronze is the ideal material for the job. These guides provide a precise fit and excellent wear resistance, ensuring your M8 valvetrain remains stable and efficient even under demanding riding conditions.