Custom made, titanium hardware, designed to replace the BMW 11-12-7-830-859 double ended head stud on the S54 (may fit other BMWs).
Made from 6AL-4V titanium alloy, these will not rust or corrode. Of course, they are lighter than stock!
Its unique design still allows for a traditional 10mm socket for installation.
NOTE; S54 engines used two of these.