This kit has a high horsepower option for ARP2000® (this is a stronger material choice and has a typical tensile strength of 220,000 psi).

Nissan RB30 engine.

Arp are the leading brand in fastener technology. All fasteners are made with the highest quality materials with quality assurance testing.

8740: This ARP head stud kit uses premium grade 8740 chrome molly. Each stud is placed vertically into special racks and precisely heat-treated to 190,000 psi. This procedure ensures complete heat penetration and the results are far superior.

ARP2000®: ARP2000 is a steel alloy that can be safely heat treated to a higher level than 8740. While 8740 and ARP2000 share similar characteristics ARP2000 can achieve a tensile strength of 220,000 psi.