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Head Stud Kit, 12-Point Nut AR234-4314 Product:fits Gen III LS Series Small Block (2003 & earlier), With All Same Le 2L L6 F/I - AllHead Stud Kit, 12 Point Nutfits Gen III LS Series Small Block (2004 & Later), With All Same Length Studs (Custom Age 625+) AR234 4314 234 4314 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