Intake & Exhaust Valve Guide. Fits Big Twin 1984-2004 & Sportster 1986-2003. Standard Outside Diameter. OEM Replacement. B-106-30-60002 * Replaces OEM # 50615-83

* Replaces OEM # 50615-83

for Pulsing Light

* Solid brass fitting replaces OEM plastic fitting

sounds nastier and pulls harder but is more difficult to tune

Part # COB-602-3501B

Intake & Exhaust Valve Guide. Fits Big Twin 1984-2004 & Sportster 1986-2003. Standard Outside Diameter. OEM Replacement. B-106-30-60002 * Replaces OEM # 50615-83Cast 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. 5620" Std size * ID = 0. 3095" * Replaces OEM # 18101 83 Tech