Oversize Intake Valve Guide. Fits Big Twin 1948-1979. +.002in. Outside Diameter
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Cast Iron: After chemically separating several samples of cast iron material , analysis and evaluating the test data, we decided to have our own specification of cast iron made exclusively , us. We specify elements such as carbon, silicon, manganese, nickel, chromium, copper and sulfur to produce a highly pearlitic structure with dense fine grains , excellent wear resistance.
* OD = 0.5670" (+0.002" Oversize)
* ID = 0.3745"
* Replaces OEM # 18143-79
Matching Exhaust Guide # KPM-20-2032C
Valve Guide Seal # KPM-71011-4