... alloy 2.Process:die-casting 3.Size: Custom High hardness Aluminum Motorcycle Engines cylinder head1.Raw material:aluminum alloy ... customer requirements.2.Type:motorcycle aluminum die-casting cylinder block.3.Color:silver white,offwhite,black,etc.4.Processing ... lathes,milling machines,deburring,polishing,spray paint,CMM,spectrometer test.5.High temperature treatment:water quenching and tempering, ...