ARP Main Stud Kits

Part #: 151-5404

Overview

The ARP Main Stud Kit is a high-strength fastening solution designed for engine builders seeking maximum reliability and durability. Crafted from premium 8740 chromoly steel and heat-treated to achieve a tensile strength of 190,000 psi, these studs are engineered to withstand the demanding conditions of high-performance engines. Ideal for performance enthusiasts, race teams, and professional rebuilders, this kit helps eliminate main cap walk and fretting, ensuring consistent engine integrity under extreme loads. The precision J-form threads are rolled after heat treatment, providing stronger, more reliable threads compared to standard fasteners. Complete with hardened, parallel-ground washers and high-quality nuts, this kit offers a comprehensive upgrade to your engine’s main cap fastening system, supporting long-term durability and peace of mind during high-stress operation.

Key Features

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

• Made from 8740 chromoly steel for exceptional toughness
• Heat-treated in-house to 190,000 psi tensile strength
• Rolled J-form threads for enhanced thread strength and durability
• Complete with hardened parallel-ground washers and nuts
• Engineered to prevent main cap walk and fretting
• Suitable for a variety of performance and racing applications

Construction & Design

The studs are machined from high-quality 8740 chromoly steel, a material renowned for its strength and fatigue resistance. The heat-treatment process enhances the tensile properties, ensuring the studs can handle extreme engine stresses. The rolled threads provide superior thread integrity, reducing the risk of stripping or failure during high-performance use. The included washers and nuts are crafted to exact specifications, ensuring proper load distribution and secure fastening.

Installation & Fitment

Installation requires proper torque specifications and should be performed by experienced technicians familiar with engine assembly. Fitment varies depending on the specific engine application; verify compatibility with your engine model and consult the manufacturer’s guidelines for optimal results.

What’s Included

The kit includes all necessary studs, hardened washers, and nuts for a complete main cap fastening upgrade, providing everything needed for a professional-quality installation.