If your high-compression or high-RPM motor blows head gaskets or blows coolant, it is likely that the head studs are not keeping enough torque pressure on the cylinder head. You can only re-torque a stud so often before they stretch and lose strength! These ARP studs are manufactured of high grade steel: they don't stretch so you pull the head down not the stud up. 9-stud kit with special machined washers and 12-point nuts are included to increase torque accuracy through better engagement; watch out for ARP kits sold under this part number, but equipped instead with cheaper 6 point nuts! Rocker studs and nuts are also included. (As a point of reference, the cost of this kit is less than stock studs alone!). Fits Classic Mini, Sprite and Morris Minor. Studs can be torqued to 65ft/lbs with oil, 55ft/lbs with the included ARP assembly lube.