These are the 7/16ths Studs that I will upgrade the Cylinder Heads with. They are just a little bit bigger in the Threaded Area. In all actuality the OEM Pontiac Rocker Arm Studs are 7/16ths where the Rocker Arm Ball slides onto the stud. Only the Threaded area is 3/8ths. I think that it makes sense to upgrade it also.
