ARP Head Bolt Kits

Part #: 207-3900

Overview

The ARP Head Bolt Kit is a high-performance fastener set designed for use in various Mitsubishi engines. Crafted with precision and durability in mind, these head bolts are ideal for enthusiasts and professional rebuilders seeking reliable clamping force and consistent torque readings. Constructed from premium materials, they help ensure proper cylinder head sealing, which is critical for optimal engine performance and longevity. Whether you're rebuilding or upgrading, these bolts provide a secure fit and peace of mind during high-stress engine operations.

Key Features

Designed for strength, durability, and precise load distribution, the ARP Head Bolt Kit offers several key benefits:

• Made from 8740 chromoly steel for exceptional tensile strength and resistance to stretching
• Heat-treated to 190,000 psi for maximum durability under high thermal and mechanical stress
• Cold-forged to ensure molecular integrity and consistent material properties
• Includes hardened parallel washers for even load distribution and accurate torque application
• Available with hex or 12-point heads to suit different installation preferences
• Engineered for reliable performance in demanding engine rebuilds and modifications
• Complete kit ensures all necessary hardware for a secure, professional installation

Construction & Design

The ARP Pro Series head bolts are manufactured from high-grade 8740 chromoly steel, which is cold-forged and heat-treated to achieve a tensile strength of 190,000 psi. This process ensures molecular integrity and resistance to fatigue, providing a robust fastening solution. The inclusion of hardened parallel washers helps distribute load evenly across the cylinder head, reducing the risk of warping or uneven sealing. The design incorporates options for hex or 12-point heads, allowing for versatile installation and compatibility with various tools and engine configurations.

Installation & Fitment

Proper installation of these head bolts requires following ARP's torque specifications and tightening sequence. It is recommended to verify fitment against your specific Mitsubishi engine model and consult the included instructions or a professional mechanic for optimal results. These bolts are designed as direct replacements for OEM fasteners, ensuring a straightforward upgrade or rebuild process.

What’s Included

The kit includes all necessary head bolts and hardened parallel washers required for a complete installation, providing a comprehensive solution for your engine rebuild or upgrade project.