Maximize the performance and reliability of your Nissan RB25 engine with the ultimate in head fastening technology: the ARP 202-4309 Pro Series Head Stud Kit.

Designed specifically for the legendary RB25DET (2.5L Inline 6) engine found in models like the Nissan Skyline R33 GTS-T, these head studs are a critical upgrade for any performance build, turbo upgrade, or engine rebuild. Don't risk a blown head gasket with stretched factory bolts—upgrade to the strength and precision of ARP.

Superior Strength & Quality:

• Material: Crafted from premium ARP 2000 alloy, a superior grade material precisely heat-treated for maximum strength.

• Tensile Strength: Rated at an impressive 220,000 psi, far surpassing the factory OEM bolts and even the standard 8740 chromoly. This immense strength ensures superior clamping force, preventing cylinder head lift under high boost and extreme combustion pressures.
• Precision Manufacturing: ARP studs are cold-forged and feature threads rolled after heat-treat, a process that yields up to ten times greater fatigue strength than fasteners threaded before heat-treating.
• Kit Contents: Each 202-4309 kit includes all necessary fasteners: head studs, parallel-ground hardened washers, and high-quality 12-point nuts for secure, accurate torque readings and even load distribution.

Whether you are pushing over 500+ horsepower or simply performing a critical engine refresh on your Straight Six Import, the ARP 202-4309 head stud kit provides the peace of mind and bulletproof reliability demanded by professional race engine builders worldwide. This is a must-have upgrade for your Nissan RB25DET engine.