MACE 12MM MAIN STUD KIT TO SUIT FORD FAIRLANE BA BF BARRA 182 190 4.0L I6Mace 12mm main stud kit is made from aircraft quality 8740 high tensile strength chromoly steel and cold forged to ensure molecular integrity. This stud kit's contents are heat treated prior to thread rolling and machining and are rated at a whopping 220,000 psi. It comes complete with 12 point nuts and hardened parallel washers for an even load distribution and accurate torque readings. This Main stud kit suits Ford Falcons and similar platforms