ARP Head Studs suit EB-AU Falcon 5L Windsor V8 SBF. ARP Head Studs to suit EB-AU 5L Windsor V8 SBF. This Head Stud kit has been assembled specifically to suit the Small Block Ford Windsor V8 engine. Made from Chromoly, these studs are sure to withstand the rigours of high boost turbo setups. Socket Size(s): 5/8 hex, 3/16 Allen. We have prepared answers to our most frequently asked questions. Performance is an Australian, family run company that sells genuine, quality performance parts from Bosch, Walbro, Turbosmart, Raceworks, BMC, Siemens, Nason, Permaseal, Fel-Pro, ARP and more, including Fuel Pumps, Fuel Injectors, Air Filters, Wideband O2 sensors, Wastegates, BOVs, Surge Tanks, Hose, AN Fittings and more. We also sell J3 Chips, Programmers, and DIY Tuning Kits to tune Ford E-Series (EA, EB, ED, EF, EL), XG and XH Falcon, Fairmont, Fairlane, XR6 and XR8 models.