ARP Pro Series Cylinder Head Stud Kit for Nissan RB20 / RB25 (202-4301)

The ARP 202-4301 Pro Series Cylinder Head Stud Kit is the industry standard rebuild upgrade for Nissan RB20 and RB25 engines. Replacing 25+ year old factory stretch bolts with high-strength studs guarantees correct torque retention and optimal head gasket seating.

Cold-forged from 8740 chromoly alloy and heat-treated prior to thread rolling, this kit provides a major strength increase over OEM hardware.

Key Features & Benefits:

• Direct OEM Replacement: Engineered to standard M11 dimensions for hassle-free installation on RB20 and RB25 heads.
• Consistent Clamping Force: 190,000 PSI tensile strength protects against cylinder pressure leaks under mild-to-moderate boost increases.
• 12-Point Fasteners: Compact 12-point nut design permits easy torquing in tight valvetrain environments.

Technical Specifications:

• Material / Build: 8740 Chromoly Steel / Black Oxide
• Warranty: Official ARP Limited Warranty
• Brand: ARP