ARP Main Stud Kits

Universal Fitment

Part #: 256-5701

Overview

The ARP Main Stud Kit is a high-strength fastening solution designed for engine builders seeking to enhance the durability and reliability of their engine assembly. Crafted from premium 8740 chromoly steel and heat-treated to achieve a tensile strength of 190,000 psi, these studs provide exceptional strength and stability. Ideal for performance applications, they help prevent main cap walk and fretting, ensuring consistent engine performance under demanding conditions. Whether you're building a high-performance street engine or a race-ready powerplant, these studs offer the confidence and security needed for a robust engine build.

Key Features

Designed with precision and durability in mind, the ARP Main Stud Kit features:

• Made from 8740 chromoly steel for superior strength and toughness
• Heat-treated in-house to 190,000 psi tensile strength for maximum durability
• Rolled J-form threads after heat treatment for stronger, more reliable threads
• Complete with hardened, parallel-ground washers for even load distribution
• High-quality nuts for secure fastening and long-term performance
• Engineered to eliminate main cap walk and protect engine threads
• Suitable for a variety of Ford applications and other compatible engines

Construction & Design

The studs are machined from high-grade chromoly steel, known for its excellent strength-to-weight ratio and resistance to fatigue. The J-form threads are precisely rolled after heat treatment, enhancing thread integrity and reducing the risk of stripping or failure during high-stress operation. The included washers are hardened and ground to ensure a perfect fit, providing even load distribution across the main caps for optimal engine stability.

Installation & Fitment

Installation requires standard engine assembly procedures; proper torque specifications should be followed to ensure optimal performance. Fitment should be verified against vehicle specifications and part compatibility to ensure proper application.

What’s Included

The kit includes all necessary studs, hardened washers, and nuts needed for a complete main cap fastening upgrade, providing everything required for a secure and reliable installation.