Head Stud Kit, 12-Point Nut AR9994401 Product:fits Holden 6cyl Red-Blue-Black Motor profiled for reduced size and

profiled for reduced size and weight

and thick wall runners provide unparalleled durability

Shot-peening

GT2 Plain Forged Front Spring PerchesPair

Head Stud Kit, 12-Point Nut AR9994401 Product:fits Holden 6cyl Red-Blue-Black Motor profiled for reduced size andHead Stud Kit, 12 Point Nutfits Holden 6cyl Red Blue Black Motor AR9994401 9994401 It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all out competition powerplants. Simply stated, there's not a better stud setup on the market today. For openers, ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated far superior to "aircraft" quality alloy steels.