20-4095C KPMI, intake/exhaust valve guide. Cast iron. STD

For those keeping a classic 1936 to 1947 Knucklehead on the road, valve guide material choice is critical. This Kibblewhite standard size valve guide is cast from high-quality iron, which remains the gold standard for maximum durability and wear resistance in long-distance touring applications. With a 0.6440-inch outside diameter, a 1.050-inch inside diameter, and a 1.900-inch overall length, it provides the stable platform your valves need to operate smoothly. Cast iron has been the industry standard since the dawn of the piston engine because of its excellent oil retention and thermal properties. These guides are precision-machined in the USA to ensure your vintage Harley-Davidson maintains proper valve alignment and compression for years to come.