Our K20C1 Type-R M-series M11 Extreme Duty head studs are made from the highest quality American steel that have gone through rigorous testing and treatment. These are not prone to hydrogen embrittlement like the L19/H11 material and it can be handled without worrying about failures. We use a true beam design all the way through the length of the stud (it's not necked-down or undercut like others) resulting in better clamping force and torque values. "Only settle for the Best!"
The kit includes: