... high quality and competitive price newly design steel valve cover Changge High Star Precision belonged to ... so on.Product detail:Products name: valve cover forgingsMaterial: Carbon Steel, Stainless Steel, Alloy Steel, Aluminium, CopperProcess: die forging / free ... Strength Alloy Steel,Alloy Steel40CrNiMo,34CrNiMo,42CrMo,35CrMo 20CrMnTCarbon Steel:S45#,S35#,S20#Stainless Steel:SUS316L,SUS316, ...