20-50HS KPMI, intake valve guide. C630. +.025"

This Kibblewhite intake valve guide is a specialized solution for 1979 to 1984 80-inch Shovelhead heads that require significant bore correction. With a +.025 inch oversize outer diameter, it allows mechanics to save heads that would otherwise be unusable. It is made from C630 nickel-aluminum-bronze, providing the superior heat transfer and toughness required for high-performance racing applications. The standard non-oversize dimensions for these heads are 0.6250 inch outer diameter, 0.3745 inch inner diameter, and 1.91 inch overall length. Sold individually, this guide ensures that even heavily modified or worn Shovelhead castings can be returned to service with a valvetrain that is more thermally efficient and durable than the original factory setup.