ARP Head Stud Kit for Toyota 1JZ-GTE / 2JZ-GTE 

When increasing boost pressure and cylinder pressure in a high-performance JZ engine, securing the cylinder head properly becomes critical for long-term reliability. The ARP Head Stud Kit is engineered to provide superior clamping force and gasket retention compared to factory head bolts, making it an essential upgrade for serious street and motorsport builds.

Manufactured from premium ARP 8740 alloy and heat-treated to 200,000 PSI tensile strength, these head studs are designed to withstand extreme combustion pressures, elevated boost levels, and sustained high-RPM operation. Unlike conventional head bolts, the stud design allows for more accurate torque loading and improved cylinder head alignment during installation.

Whether you're building a high-boost 1JZ-GTE drift car, a fully built 2JZ-GTE drag engine, or simply reinforcing your engine for increased reliability, this ARP head stud kit delivers the clamping force trusted by professional engine builders worldwide.

Proven in countless high-horsepower JZ builds, ARP fasteners are the industry standard for securing Toyota’s legendary inline-six engines under the most demanding conditions.

Carefully selected for builders who demand proven performance without compromise.

Why Upgrade Your Head Studs?

Compared to factory head bolts:

✔ Significantly increased clamping force for high-boost applications
✔ Improved head gasket sealing under extreme cylinder pressure
✔ More accurate and consistent torque loading
✔ Heat-treated ARP 8740 alloy construction
✔ Trusted by professional engine builders worldwide

Key Features

✔ Genuine ARP head stud kit
✔ Manufactured from premium ARP 8740 alloy
✔ Heat-treated to 200,000 PSI tensile strength
✔ Designed for extreme boost and high-horsepower applications
✔ Improves cylinder head stability and gasket retention
✔ Ideal for street, drift, drag, and circuit builds

Technical Specifications

✔ Brand: ARP
✔ Part Number: AR8630
✔ ARP Reference: 203-4205
✔ Product Type: Cylinder Head Stud Kit
✔ Material: ARP 8740 Alloy Steel
✔ Tensile Strength: 200,000 PSI
✔ Application: High-Performance Cylinder Head Fastening
✔ Engine Family: Toyota JZ-Series

Compatible Engines

✔ 1JZ-GTE
✔ 2JZ-GTE

Shipping

🇪🇺 EU Delivery: 5–10 Business Days
🌍 International Delivery: 7–21 Business Days