ARP Pro Series Harmonic Balancer Bolt Kit

Chevrolet Gen III/IV LS Engines 2004–Present / Small Block Chevrolet 7.0L (LS7) and 6.2L (LT1)

Part #: 234-2504

Overview

The ARP 12-pt Harmonic Balancer Bolt Kit is a high-performance fastener solution designed specifically for Chevrolet LS engines, including the powerful LS7 and the modern 6.2L LT1. Engineered with precision and durability in mind, this kit ensures your harmonic damper remains securely attached under demanding conditions. Whether you're building a high-performance street machine, a race car, or performing routine maintenance, this bolt kit provides the strength and reliability you need to keep your engine running smoothly.

Designed for enthusiasts who demand the best, the ARP Pro Series harmonic damper bolt kit offers peace of mind during intense driving sessions, track days, or off-road adventures. Its robust construction helps support increased engine stresses, ensuring your damper stays in place to maintain proper timing and engine balance. With ARP's reputation for quality and innovation, this kit is an essential upgrade for serious Chevrolet engine builders and tuners.

Key Features

The ARP Pro Series Harmonic Balancer Bolt Kit is packed with features that deliver superior performance and durability:

• Manufactured from high-strength 8740 chromoly steel, rated at 200,000 psi tensile strength, providing exceptional durability and resistance to shear forces.
• Hot forged to ensure molecular integrity, resulting in a superior grain structure that withstands extreme engine conditions.
• Precision CNC machined damper bolt with M16 x 2.00 thread size, ensuring perfect fitment and consistent torque application.
• Includes a CNC machined damper washer designed to distribute load evenly and prevent damage to the harmonic balancer.
• Supplied with a 1/2 oz. pack of ARP Ultra-Torque fastener assembly lubricant, which helps achieve proper torque and prevents galling during installation.
• 12-point head design allows for easier installation and removal in tight engine bays, reducing the risk of stripping or rounding off the bolt head.
• Engineered specifically for LS engines, ensuring compatibility with a wide range of Chevrolet performance builds.
• Ideal for high-performance applications where maintaining proper damper retention is critical for engine timing and longevity.
• Backed by ARP’s industry-leading quality standards and extensive testing, guaranteeing reliable performance under demanding conditions.

Construction & Design

The ARP harmonic balancer bolt kit features a one-piece, heat-treated chromoly steel construction that provides unmatched strength and resilience. The hot forging process aligns the grain structure for maximum toughness, while the CNC machining ensures precise dimensions and thread integrity. The 12-point head design offers enhanced access during installation and removal, especially in confined engine compartments. The included damper washer is also CNC machined from high-quality steel, providing a secure bearing surface that helps prevent damage to the harmonic balancer and crankshaft snout. This meticulous attention to detail results in a fastener system that not only withstands extreme engine stresses but also maintains consistent torque and clamping force over time.

Installation & Fitment

The ARP Harmonic Balancer Bolt Kit is a straightforward, bolt-on upgrade that requires no special tools beyond standard hand tools and a torque wrench. The kit is designed to replace the factory damper bolt and washer, fitting all Chevrolet LS engines with M16 x 2.00 threads, including LS7 and LT1 applications from 2004 to present. Proper installation involves applying the included Ultra-Torque lubricant to the threads, tightening to the manufacturer’s specified torque, and ensuring the damper is securely fastened. No cutting, drilling, or complex modifications are necessary, making this an ideal upgrade for both professional mechanics and DIY enthusiasts seeking a reliable, high-strength fastener solution.

What's Included

• One (1) M16 x 2.00 Pro Series damper bolt made from high-strength 8740 chromoly steel
• One (1) CNC machined damper washer
• One (1) 1/2 oz. pack of ARP Ultra-Torque fastener assembly lubricant

Ideal For

• High-performance Chevrolet LS engine builds
• Street, track, and racing applications requiring reliable damper retention
• Engine rebuilds and upgrades where maintaining proper crankshaft timing is critical
• Enthusiasts seeking ARP’s proven quality and strength for critical fasteners