ARP Fasteners - Ford BA / FG XR6 CA625 Head Studs - AR9993901CUSTOM AGE 625+ HEAD STUD KIT WITH 12 POINT NUTS SUIT FORD FALCON BA BF FG 'BARRA' 6CYL TURBO & NON TURBO 2002 ONWARDS All Custom Age 625+ studs are centerless ground, heat treated prior to thread rolling and machining, and are nominally rated at 270,000 psi. These fasteners deliver a 30% increase in tensile strength over the OEM Torque To Yield (TTY) head bolts. AR9993901 CA SOLD AS A SET