ARP2000 Main Stud Kit Nissan RB25DET / RB26DETT

ARP main stud kit in ARP2000 grade for Nissan 2.5L and 2.6L 24v inline-6 engines from the RB series. Secures the crankshaft main caps to the engine block under the heavy stresses of motorsport and high boost applications.

Technical specifications

• Manufacturer: ARP (Automotive Racing Products)
• Origin: Made in USA (Santa Paula and Ventura, California)
• Part number: 202-5403
• Type: Main stud kit
• Material: ARP2000 (molybdenum-vanadium steel)
• Tensile strength: 220,000 psi (1517 MPa)
• Manufacturer certifications: ISO 9001 and AS9100
• Packaging: Complete kit for 1 RB engine block

Kit contents

• Main studs
• Nuts
• Hardened washers

About ARP2000 material

ARP2000 is a molybdenum-vanadium steel specifically developed and treated by ARP. It offers a tensile strength of 220,000 psi (1517 MPa), approximately 10% higher than standard 8740 chromoly. This increased strength provides better fatigue resistance and an improved safety margin against main cap walk under high load, particularly critical on RB25DET and RB26DETT engines built for high boost.

ARP process

ARP studs are forged from high strength materials, machined on precision CNC centres and individually heat treated. Each stud is inspected to ensure compliance with ARP's aerospace specifications.

Application

Compatible with Nissan inline-6 engines from the RB series (shared engine block):

• Nissan RB25DET (2.5L 24v turbo)
• Nissan RB26DETT (2.6L 24v twin turbo)

Important: use exclusively with ARP Ultra-Torque lubricant (part 100-9904) to ensure correct preload. Strictly follow the torque sequence and values provided in the ARP instructions included with the kit. Use of an ARP stretch gauge is strongly recommended for the most demanding applications.