All Pro Series ARP2000 studs are centerless ground, heat treated prior to thread rolling and machining, and are nominally rated at 220,000 psi. These fasteners deliver a 35% increase in tensile strength over the OEM torque-to-yield (TTY) head bolts.
- (10) ARP2000 head studs
- (10) parallel ground washers
- (10) 8740 chromoly steel 12pt nuts
- (1) .5 oz. pack of ARP Ultra-Torque fastener assembly lubricant
Because of the many head lifting issues on 4B11 Evo X blocks running in excess of 35+ PSI, a stronger stud needed to be manufactured to meet the demands of today’s top engine builders and racers alike. No Modification to your cylinder head or block is required as these are a direct drop-in replacement for the OEM head stud!
Fastener Style: M12 ARP2000 Material Studs
Fastener Nut Style: Standard hex
Fastener Yield Strength (psi): 220,000 psi
Nuts Included: Yes, 8740 Material
Washers Included: Yes
Quantity: Sold as a kit.