... CNG auto engine models and motorcycles.trusted material of engine valve for Structural Steel, such as 40Cr / Martensitic Steel, such ... usd30,000.5. Warranty: 2 years in 65,000kms. OEM's quality and After-sales market.6. Qualified certification: ... Combustion Engine Valve Guide Specification (JB/T) ".9. Application:JAPAN series---DAIHATSU, HINO, HONDA,ISUZU, KOMATSU, MAZDA, MITSUBISHI, NISSAN, SUZUKI, ...