Rated at a tensile strength 190,000 to 200,000 PSI. Material 8740 Chrome moly. U.S. made. These studs eliminate problems associated from head bolt use. Common problems include bolt breakage, block and thread damage, less clamping force and bolt stretch, constant retorquing of cylinder head, rear oil gallery leakage. Keep that head from movin' around. Torque spec. 65 Ft Lbs Moly lube. 80 FT Lbs. Oil. See part#1955 for Nissan original Head bolt kit.

3rd run now has allen key in the long stud as well to make threading into the block easier.

Please be sure to tap out the block before installing with a 7/16" X 14 tap. These are studs are a free floating fastener so it is not neccessary to lock tite or bottom out and torque them into the block.