ARP Pro Series Head Stud Kit – Nissan RB25DET | ARP2000 | 202-4309

Secure your RB25DET cylinder head with the confidence of ARP’s Pro Series Head Stud Kit. Engineered specifically for the Nissan RB25DET 2.5L inline-six, this kit replaces the factory head bolts with high-strength ARP2000 alloy studs — delivering the clamping force and fatigue resistance required for high-boost builds, turbo upgrades, and performance engine rebuilds. A critical upgrade for any serious RB25 build.

Key Features

• ARP2000 Alloy Material: Premium ARP2000 alloy, precisely heat-treated for maximum strength — significantly superior to factory OEM bolts and standard 8740 chromoly
• 220,000 PSI Tensile Strength: Exceptional clamping force prevents cylinder head lift under high boost and extreme combustion pressures
• Threads Rolled After Heat-Treat: Cold-forged studs with threads rolled after heat-treating yield up to 10x greater fatigue strength than fasteners threaded before heat-treating
• Complete Kit: Includes head studs, parallel-ground hardened washers, and high-quality 12-point nuts for accurate torque readings and even load distribution
• RB25DET Specific: Engineered for the Nissan RB25DET 2.5L inline-six — fits Skyline R33 GTS-T and other RB25DET applications
• ARP Quality: Trusted by professional race engine builders worldwide

Specifications

• Material: ARP2000 Alloy
• Tensile Strength: 220,000 PSI
• Includes: Head studs, hardened washers, 12-point nuts
• Part Number: 202-4309
• Application: Nissan RB25DET 2.5L Inline-6

Common Fitment

• Nissan Skyline R33 GTS-T — RB25DET
• All RB25DET applications — verify fitment for your specific variant

Note: Professional engine assembly required. Always use ARP Ultra-Torque fastener assembly lubricant and follow ARP’s specified torque procedure for accurate clamping load. Head gasket replacement recommended at installation.