... cylinder block 3.ISO9001:2008 4.Aluminum cylinder head 4 valve cylinder head for 188F gasoline engine.We are a real ... ,2343,SKD61,45#steel,etc.Heat treatmentHardened,NitridingHardnessHRC50~55Mould featureAdvanced design, Novel structure, High precision, Quality materials, Long lifetime, Short delivery ... finish some die casting projects with you together perfectly. 4 valve cylinder head