ARP 1JZ & 2JZ Head Stud Kit


 Ships in 1 – 3 business days


ARP 1JZ & 2JZ Head Stud Kit

Automotive Racing Products (ARP) are the leading brand in fastener technology. All fasteners are made with the highest quality materials with quality assurance testing.

ARP manufactures fasteners from a wide assortment of materials ranging from popular stainless steel and 8740 chrome moly to exotic alloys that have been developed to handle space travel.

The ARP 1JZ & 2JZ Head Studs are available in either premium grade 8740 chrome moly or Custom Age 625 Plus® and includes hardened parallel washers for an even load distribution and accurate torque readings.

8740 Chrome Moly: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard ARP production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.

Custom Age 625 Plus®: This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.

Socket Size: 1/2 12pt, 3/16 Allen

ARP 1JZ & 2JZ Head Stud Kit Suits: Toyota 1 JZ-GTE, 2 JZ-GE & 2 JZ-GTE

ARP 1JZ & 2JZ Head Stud Kit Part Numbers: 203-4205 (8740) and 203-4301 (CA625+)

Please note: Lead times may apply for the CA625+ Head Stud Kit.

Want to talk to us?

At Street Race Solutions, we utilise ARP 1JZ & 2JZ Head Stud Kits in all of our JZ engine builds. If you have any question relating to ARP Fasteners or JZ engine components, please call us on 07 4602 3858!


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