20-4096C KPMI, intake/exhaust valve guide. Cast iron. +.002"

When rebuilding a 1936 to 1947 Knucklehead, you often find that the cylinder head guide bores have worn beyond standard limits. This Kibblewhite cast iron valve guide is oversized by .002 inches to provide a proper press fit in those aged heads. Cast iron is the preferred material for these vintage engines due to its incredible durability and natural wear resistance, making it perfect for touring and long-term use. While the standard outside diameter is 0.6440 inches, this version provides the extra material needed to clean up the bore. Precision-machined in the USA, these guides ensure that your Knucklehead's valvetrain remains stable and reliable, preserving the performance of a true American classic.