ITEM : CRANKSHAFT FOR Isuzu 4JA1/4JB1/4JB1T/4JE1 etc. They are our regular exported items . Material: FORGED STEEL / CAST IRON ; Heat Treatment: Ion nitriding; We are a professional trading exporter , mainly for Cylinder head ,Cylinder block,Crankshaft ,Camshaft,Cylinder liner,Engine valve ,Engine bearing,Clutch cover&disc,Water pump ,Belts ,etc.