This a set of 2 180 KSI connecting rod bolts. These are as strong as the stock rod bolts but have the Torx Plus drive system to make them easier to install and torque. They are 7/8″ long so they can engage all of the threads in the connecting rod. They will stick out a bit on the other side but still clear an 820 engine block on a standard stroke crankshaft. They are too long for a 610 block. They use a T27 Torx wrench.