7 We are going to upgrade from a 3/8 stud to a 7/16 stud. The lower threads are the same so it is just a simple remove and replace. The larger studs will be stronger and will have less deflection giving the rockers a more solid foundation, which in turn will extend their life and performance. The two-piece guide plates are a new product from Comp and are a welcome addition to the product line. The interlocking design enables a reliable and true adjustment in the one axis needed for most valves. This prevents issues associated with prying or cutting the guide plate, especially on heads with altered valve centerlines.