Special high tension bolt suitable for Billet alloy rods, similar to ARP 2000 specification, bolt will fit SRM Billet alloy rods and a few diffrent manufactuers Billet alloy rods, specifications:-
Bolt diameter = 3/8
Thread = 3/8 UNF
Length of bolt from under head = 43.0mm (1.690 inches)
Length of thread = 22.70mm (0.890 inches)