ARP Harmonic Balancer Bolt

2010–2020 Mitsubishi 4G63

Part #: 207-2501

Overview

The ARP Harmonic Balancer Bolt for the 4G63 engine is a high-strength fastener designed to ensure the secure attachment of the harmonic balancer to your engine's crankshaft. When working with high-performance or heavily modified Mitsubishi 4G63 engines, maintaining proper harmonic balancer retention is critical for engine reliability and smooth operation. These bolts are engineered to withstand the intense stresses and torsional forces generated during spirited driving, racing, or high-rev applications.

If you're an enthusiast looking to restore or upgrade your engine's durability, ARP's harmonic balancer bolt provides peace of mind by offering a reliable, heavy-duty solution that prevents slippage or failure of the balancer under demanding conditions. Proper installation of these bolts ensures your engine runs smoothly, reduces the risk of damaging the crankshaft or timing components, and supports optimal engine performance.

Key Features

ARP's harmonic balancer bolt is crafted with precision and built from ultra-strong materials to deliver maximum clamping force and durability. Key features include:

• High-Strength Material: Manufactured from 200,000 psi tensile strength alloy steel, these bolts are designed to withstand extreme engine loads and vibrations.
• Wide Area Washer: The included 1/4" thick washer distributes clamping force evenly across the harmonic balancer, reducing the risk of bolt head or crankshaft damage.
• Deep Socket Compatibility: The extra tall 12-point head allows for easy installation and removal with a deep socket, providing better access in tight engine bays.
• Corrosion Resistance: ARP bolts are plated to resist rust and corrosion, ensuring long-lasting performance in various environmental conditions.
• Precision Manufacturing: Each bolt is meticulously machined and tested to meet or exceed OEM specifications, guaranteeing a perfect fit and reliable clamping force.
• Engine Compatibility: Specifically designed for the Mitsubishi 4G63 engine, ensuring proper fitment and function.

Construction & Design

The ARP Harmonic Balancer Bolt is constructed from premium alloy steel, heat-treated to achieve a tensile strength of 200,000 psi. Its one-piece design ensures maximum strength and reliability, while the wide area washer enhances load distribution. The deep 12-point head is engineered for easy access with standard or deep sockets, reducing the risk of stripping during installation or removal. The bolt's surface is plated with ARP's proprietary finish, providing excellent corrosion resistance and longevity. These design choices collectively improve the durability of your engine assembly, especially under high-stress conditions.

Installation & Fitment

Installing the ARP Harmonic Balancer Bolt is straightforward and requires no special tools beyond standard socket sets. The bolt threads directly into the crankshaft of the Mitsubishi 4G63 engine, replacing the factory fastener. It is recommended to apply ARP Ultra-Torque fastener assembly lubricant during installation to achieve the specified clamping force. Proper torque specifications should be followed as per ARP's instructions to ensure optimal performance and safety. No additional modifications or tuning are necessary, making this a reliable upgrade or replacement part for your engine rebuild or maintenance.

What's Included

• ARP Harmonic Balancer Bolt (part number 207-2501)
• 1/4" thick wide area washer
• Installation instructions

Ideal For

• Engine rebuilds and upgrades for Mitsubishi 4G63 engines
• High-performance street and racing applications
• Enthusiasts seeking a reliable, heavy-duty fastener for harmonic balancer retention
• Restoration projects requiring OEM-quality replacement parts