ARP Main Stud Kit for Nissan RB20 / RB25 / RB26 / RB30 (202-5403)

The ARP 202-5403 Main Stud Kit is an absolute necessity for building high-horsepower Nissan RB series inline-six engines. Replacing OEM main bolts with ARP studs prevents main cap walk and fretting while guarding fragile cast block threads against stress galling.

Precision ground and thread-rolled post heat treat from 8740 chromoly alloy, these studs deliver stable clamping pressure across the entire crankshaft line.

Key Features & Benefits:

• Eliminates Main Cap Walk: Keeps main caps firmly seated to protect main bearings during high-RPM operation.
• Thread Integrity Protection: Distributes clamping forces deeper into block threads to prevent stripping under heavy torque.
• Universal RB Fitment: Fits all major Nissan RB engine platforms including RB20, RB25, RB26, and RB30 blocks.

Technical Specifications:

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