Kit includes; 14 8740 chromoly Studs, 14 12 Point Cylinder head nuts and 14 Heavy Duty Washers. These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at 190,000 psi. The Pro series kit has 12-point nuts, and comes complete with hardened parallel washers for an even load distribution and accurate torque readings. Bar none these are the best cylinder head studs, nuts and washers you can buy for your Triumph Engine.