Cylinder Head for Automobile Spare Parts 1.Aluminum die casting 2.ISO9001:2008 3. ... SGS 4.Good quality,fast delivery Cylinder Head for Automobile Spare PartsWe are a real factory that is professional on ... ,2343,SKD61,45#steel,etc.Heat treatmentHardened,NitridingHardnessHRC50~55Mould featureAdvanced design, Novel structure, High precision, Quality materials, Long lifetime, Short delivery ...