ARP Main Stud Kits

Universal Fitment

Part #: 150-5801

Overview

The ARP Main Stud Kit is a high-strength fastening solution designed for engine builders seeking enhanced durability and reliability. Crafted from premium 8740 chromoly steel and heat-treated to achieve a tensile strength of 190,000 psi, these studs provide a robust alternative to traditional main cap bolts. Ideal for performance enthusiasts and professional rebuilds, this kit helps prevent main cap walk and fretting, ensuring consistent engine integrity under demanding conditions. The precision J-form threads are rolled after heat treatment, resulting in stronger, more reliable threads than standard fasteners. Complete with hardened, parallel-ground washers and high-quality nuts, this kit offers a comprehensive solution for securing your engine’s main caps with confidence.

Key Features

Designed for maximum strength and durability, the ARP Main Stud Kit features:

• Made from 8740 chromoly steel for exceptional toughness
• Heat-treated in-house to 190,000 psi tensile strength
• Precision rolled J-form threads for superior thread strength
• Hardened, parallel-ground washers for consistent load distribution
• High-quality nuts for secure fastening
• Engineered to eliminate main cap walk and fretting
• Suitable for a variety of Ford engine applications

Construction & Design

The studs are machined from high-grade chromoly steel, known for its strength-to-weight ratio and durability. The heat-treatment process enhances tensile strength, ensuring the fasteners can withstand the stresses of high-performance engine operation. The rolled threads provide a smooth, strong interface that resists stripping and fatigue, while the parallel-ground washers ensure even load distribution across the main caps, reducing the risk of warping or damage.

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 engine model and the part number provided. These studs are designed to replace standard main cap bolts, offering a bolt-on upgrade that enhances engine reliability.

What’s Included

The kit includes all necessary studs, hardened washers, and nuts needed for a complete main cap fastening upgrade, ensuring a straightforward installation process and a secure, long-lasting engine assembly.

Ideal For

This product is ideal for engine builders, performance enthusiasts, and professional rebuilders looking to strengthen their engine’s main cap fastening system and improve overall engine durability.