724215 Kpmi C630 Ex Valve Guide Xl57 85 002

These Kibblewhite Precision Machining valve guides are crafted from C630 bronze, a high-performance alloy of copper, nickel, and aluminum. Designed specifically for Sportster models, these guides provide excellent heat dissipation and work-hardening characteristics that ensure a long service life. The precision machining process ensures perfect concentricity, making them a favorite for serious engine builders. Because they are made from C630 bronze, they are highly compatible with aluminum heads and allow for tighter tolerances, which improves overall valve and seat sealing. These guides are sold individually and feature an inside bore that is slightly undersized, requiring final reaming for a perfect fit. They are the ideal choice for riders looking for maximum reliability and oil control in their top end.