ARP Main Stud Kits

Universal Fitment

Part #: 156-5401

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 help prevent main cap walk and fretting, ensuring the integrity of your engine block during high-performance applications. Ideal for custom builds, rebuilds, or any engine where maintaining proper main cap alignment is critical, this kit provides a secure, stable foundation for your engine’s internal components. The precision J-form threads are rolled after heat treatment, resulting in stronger, more durable threads compared to standard fasteners, which helps support long-term performance and peace of mind. Whether you're a professional engine builder or a serious enthusiast, these main studs are engineered to provide consistent clamping force and reduce the risk of engine failure under demanding conditions. The kit includes all necessary hardware—hardened parallel-ground washers and high-quality nuts—making installation straightforward and reliable. Designed to fit multiple Ford applications, these studs are an essential upgrade for those looking to maximize engine strength and longevity.

Key Features

Designed with durability and strength in mind, the ARP Main Stud Kit offers several key benefits:

• Made from 8740 chromoly steel for exceptional toughness and fatigue resistance
• Heat-treated in-house to a 190,000 psi tensile-strength rating for maximum durability
• Rolled J-form threads after heat treatment for stronger, more reliable threads
• Complete with hardened parallel-ground washers and high-quality nuts for secure fastening
• Engineered to eliminate main cap walk and fretting during high-stress operation
• Suitable for multiple Ford engine applications, ensuring versatile compatibility
• Supports consistent clamping force for improved engine stability and longevity