ARP Main Stud Kits

Part #: 203-5406

Overview

The ARP Main Stud Kit is a high-strength fastening solution designed for performance engine builds. Crafted from premium 8740 chromoly steel and heat-treated to achieve a tensile strength of 190,000 psi, these studs provide exceptional durability and reliability. Ideal for enthusiasts and professional builders, this kit helps secure engine main caps, preventing walk and fretting under high-stress conditions. 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, supporting your vehicle’s performance and longevity.

Key Features

Designed for strength and durability in high-performance applications, the ARP Main Stud Kit offers:

• Made from 8740 chromoly steel for superior strength
• Heat-treated to 190,000 psi tensile strength for maximum reliability
• Precision rolled J-form threads for enhanced thread strength
• Complete with hardened washers and high-quality nuts for secure fastening
• Engineered to eliminate main cap walk and fretting
• Suitable for a variety of Toyota engine applications
• Manufactured and assembled in-house for quality control

Construction & Design

The studs are machined from 8740 chromoly steel, a material renowned for its toughness and resistance to fatigue. The heat treatment process enhances tensile strength, ensuring the studs can withstand the demanding conditions of high-performance engines. The rolled J-form threads provide a tight, secure fit, reducing the risk of thread stripping or failure during engine operation. The included washers are parallel-ground and hardened, designed to distribute load evenly and maintain integrity under stress.

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 vehicle model and engine configuration to ensure compatibility.

What’s Included

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