Kibblewhite Precision 20-2121M Manganese Bronze Intake Valve Guide (+.001)

Precision-machined guidesManganese bronze guide material is softer than nickel aluminum bronze valve guidesExcellent heat conductivity which promotes long valve lifeMaterial hardness helps support valve guide longevityGuides can be easily reamed with a battery-operated or electric drill and finished with a high-quality ball honeEliminates the need for expensive honing equipment that would be required for nickel bronze valve guidesMachined to accept OEM and aftermarket sealsGreat choice for the home builderMade in the USA Outside Dia.: (G): 0.5630in./ +0.001in.A: 0.650in.B: 0.700in.C: 0.800in.D: 1.400in.E: 0.615in.F: 0.3098in.Note: Special shouldered guide, accepts 0.600in. valve lift. 0.420in. guide top accepts KPMI OEM style seal 20-20620, Steel Clad Viton seal 20-2015, and Solid White PC Style Seal 20-2009