Engine Rebuild Kit Fits 2011 Polaris Ranger RZR 4 800 EPS Robby Gordon 10.EK5805.A1

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.