Dirtbike Engine Accessories Bore 95mm Cylinder Block For YZ450F YFZ450 YFZ450R WR450F 2S2-11311-00-00 2S2-11311-10-00 Material Type: Cast iron with ceramic Displacement: 450 ml Compatibility: YZ450F, YFZ450, YFZ450R, WR450F Special Features: Direct replacement with performance ceramic coating Item Dimension: 9.5 cm bore diameter External Certification: ISO9001 certified The cylinder block is constructed from cast iron with a ceramic , designed to support efficient combustion and improved engine performance.The ceramic coating on the inner wall enhances and contributes to smoother.With a 450 ml displacement and a bore diameter of 9.5 cm, this cylinder block is engineered for precise fitment on compatible models.It serves as a direct replacement part, allowing for straightforward integration into existing engine setups.The product is ISO9001 certified, meeting established international quality standards.