This is a new US Made and very correct head bolt. This is for the 134F four cylinder motor. This is the Willys motor with the four intake valves in the head. This particular motor takes fifteen head bolts BUT!! one is short so you will need fourteen of these long ones. It is right at 4 1/2″ long and is coarse thread. These have six little raised lines on the head so they are grade 8 bolts.