... :200,000 kilometers.2. Main products: Enigne valve,valve guide,valve seat3.Material: We use High Phosphor Cast Iron Alloy ... to be our Valve Guide MateriaL.High attrition endurance, High temperature endurance,High erosion ... (JB/T)"6. ISO9001 Quality Control System, passed TS16949 Quality Management System Certification Valve Guide For TOYOTA J,2J,JK-170/OE:11122- ...