[CYLINDER HEAD BOLT SET]
HKS Cylinder Head Bolt Set contains high durable cylinder Head Bolts and Head Bolt washers that avoid damage to cylinder Head Bolts and washers and decrease in tightening force caused by use under high boost pressure. New material was selected to make these cylinder Head Bolts for higher durability. Carburizing process was employed to make the Head Bolt washers thicker, and inner diameter was reduced to increase the seating area.
