ARP Main Stud Kits

Part #: 218-5401

Overview

The ARP Main Stud Kit is a high-performance engine component designed to enhance the durability and reliability of your engine's main cap assembly. Crafted for automotive enthusiasts and professional builders, this kit provides a robust solution to prevent main cap walk and fretting, especially in high-stress or high-performance applications. Made from premium 8740 chromoly steel and heat-treated to achieve a tensile strength of 190,000 psi, these studs are engineered for maximum strength and longevity. The precision J-form threads are rolled after heat treatment, resulting in stronger, more reliable threads compared to standard fasteners. Complete with hardened, parallel-ground washers and high-quality nuts, this kit ensures a secure and stable engine assembly, giving you added confidence during assembly and operation.

Key Features

This ARP Main Stud Kit combines advanced materials and precise manufacturing to deliver superior performance and durability. Key features include:

• Constructed from 8740 chromoly steel for exceptional strength and toughness
• Heat-treated in-house to 190,000 psi tensile strength for maximum durability
• Rolled J-form threads for stronger, more reliable engagement
• Includes hardened, parallel-ground washers for even load distribution
• High-quality nuts designed for secure fastening under high stress
• Engineered to prevent main cap walk and fretting in high-performance engines
• Suitable for a variety of Mazda engine applications, ensuring versatile fitment

Construction & Design

The studs are machined from high-grade chromoly steel, known for its excellent strength-to-weight ratio and resistance to fatigue. The heat-treatment process enhances tensile strength, ensuring the studs can withstand extreme engine conditions. The rolled threads are designed for optimal engagement and load transfer, reducing the risk of thread stripping or failure during high-stress operation.

Installation & Fitment

Installation requires proper torque specifications and should be performed by experienced technicians familiar with engine assembly. Fitment details should be verified against your specific Mazda engine model and the part number provided.

What’s Included

The kit includes all necessary studs, hardened washers, and nuts required for a complete main cap reinforcement upgrade.

Ideal For

This product is ideal for high-performance engine builds, rebuilds, or applications where engine strength and reliability are critical. Suitable for enthusiasts seeking to maximize engine integrity and longevity in Mazda vehicles.