ARP Balancer Bolt Kits

Multiple Chevrolet Fitments 2011–2025

Part #: 135-2501

Overview

The ARP Balancer Bolt Kit is a high-quality fastening solution designed specifically for Chevrolet engines across various models and years. Engineered to ensure the harmonic balancer remains securely in place, this kit is essential for performance enthusiasts and professional rebuilders who demand durability and reliability. Whether you're performing a routine maintenance or building a high-performance engine, ARP's balancer bolt kit provides the peace of mind that your crankshaft and balancer are properly secured, helping to prevent slippage and potential engine damage.

Designed with precision and strength in mind, this bolt kit is ideal for street, performance, and racing applications. It helps support the engine's overall integrity by maintaining proper timing and balance, which are critical for smooth operation and longevity. If you're upgrading or replacing your balancer bolt, ARP offers a trusted solution that combines strength, quality, and ease of installation.

Key Features

ARP's Balancer Bolt Kit features several key attributes that make it a top choice for engine builders and enthusiasts:

• Constructed from 8740 chromoly steel, known for its exceptional strength and toughness, ensuring the bolt can withstand the stresses of high-performance operation.
• Black oxide finish provides corrosion resistance and a sleek appearance, suitable for both stock and modified engines.
• Designed with a 12-point head, allowing for easier installation and removal in tight engine bays, and reducing the risk of stripping the head during torque application.
• Thread size of 1/2 in.-20 ensures compatibility with a wide range of Chevrolet engines, providing a secure fit and optimal clamping force.
• Underhead length of 1.550 inches offers the proper engagement depth for secure fastening without over-stressing the bolt or the crankshaft.
• Includes a washer to distribute load evenly and prevent damage to the crankshaft or balancer during installation.
• Rated with a tensile strength of 200,000 psi, providing the durability needed for high-performance and demanding engine environments.

Construction & Design

The ARP Balancer Bolt Kit is meticulously engineered using premium materials to ensure maximum strength and longevity. The 8740 chromoly steel construction offers superior tensile strength and fatigue resistance, making it suitable for both daily driving and high-stress racing conditions. The black oxide finish not only enhances corrosion resistance but also provides a professional, finished look.

The 12-point head design allows for easier access in confined spaces, enabling installers to achieve proper torque without difficulty. The precise thread pitch and length are engineered to match OEM specifications, ensuring a perfect fit and reliable clamping force. The inclusion of a washer helps distribute the load evenly, reducing the risk of damage to the crankshaft or balancer during installation.

Performance & Reliability

While this bolt kit does not directly increase horsepower or torque, it plays a crucial role in maintaining engine integrity during high-performance operation. Properly securing the harmonic balancer prevents slippage, which can lead to timing issues, vibrations, and potential engine failure. The high tensile strength of the fasteners ensures they can withstand the forces generated during spirited driving or racing, providing consistent performance and peace of mind.

Installation & Fitment

The ARP Balancer Bolt Kit is designed for straightforward, bolt-on installation. It uses the factory mounting points and thread specifications, making it compatible with a wide range of Chevrolet engines from 2011 to 2025. No special tools or modifications are required, and the kit is suitable for both professional mechanics and experienced DIY enthusiasts. Always follow torque specifications provided by ARP to ensure proper installation and optimal performance.

• Easy to install with standard hand tools.
• No cutting, drilling, or special modifications needed.
• Designed to fit multiple Chevrolet models and engine configurations within the specified years.

What's Included

• One high-strength 8740 chromoly balancer bolt with 12-point head
• Included washer for load distribution

Ideal For

• Engine rebuilds and upgrades for Chevrolet vehicles
• Performance enthusiasts seeking reliable, high-quality fasteners
• Professional engine builders and mechanics
• Street and racing applications requiring durable, high-tensile fasteners

Emissions Note

This product is designed for off-road, racing, or replacement use only and may not be legal for use on pollution-controlled vehicles in all jurisdictions. Please verify local regulations before installation.