Oversize Intake & Exhaust Valve Guide. Fits Big Twin 1984-2004 & Sportster 1986-2003. +.001in. Outside Diameter

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 = 0.5630" Std size

* ID = 0.3095"

* Replaces OEM # 18130-83

Tech Tips:-

Sold Each - 2 Required per Cylinder Head

Valve Guide Seal # KPM-71010-4