ARP 204-4206 Porsche Head Stud Kit - 911-930 Turbo VBMYE56_516

Product details:

These head studs are manufactured from premium 8740 chrome moly steel and heat treated to 200,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included. Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly.