ARP Main Cap-Side Bolt

Universal Fitment

Part #: 156-5202

Overview

The ARP Main Cap-Side Bolt Kit is a high-performance fastener designed for professional engine builders and automotive enthusiasts seeking reliable, durable hardware for engine assembly. Crafted from premium materials, these bolts are engineered to withstand the demanding conditions of high-performance applications, ensuring your engine maintains integrity under stress. Whether you're rebuilding or upgrading your engine, these bolts provide a secure fit and peace of mind, supporting optimal engine performance and longevity. Constructed from forged 8740 chromoly steel, ARP's main cap bolts are rated at 180,000 psi, offering exceptional strength and fatigue resistance. Their design features a reduced wrenching head for easier installation, a large underhead radius to distribute load evenly, and rolled threads that are heat-treated for maximum durability. These features work together to enhance the reliability of your engine assembly, reducing the risk of fastener failure during operation. Key Features

Key Features

Designed for high-stress engine environments, these bolts offer:

• Forged 8740 chromoly steel construction for superior strength
• Rated at 180,000 psi for high-performance durability
• Rolled threads with heat treatment for enhanced fatigue strength
• Reduced wrenching head for easier installation
• Large underhead radius to distribute stress evenly
• Precision-machined for a perfect fit in compatible engine blocks
• Suitable for a variety of Ford engine applications

Construction & Design

The bolts are forged from high-grade 8740 chromoly steel, known for its excellent toughness and fatigue resistance. The rolled threads are heat-treated to improve strength and reliability, ensuring they can withstand the rigors of high-performance engine operation. The reduced head design facilitates installation in tight spaces, while the large underhead radius helps distribute load evenly across the fastener, reducing stress concentrations.

Installation & Fitment

These bolts are intended for use as replacements or upgrades in compatible Ford engine applications. Proper torque specifications should be followed during installation to ensure optimal clamping force and engine integrity. Verify fitment against your engine model and part number before installation.

What’s Included

The package includes the necessary bolts for your main cap side fastener replacement, designed to meet or exceed OEM specifications for performance and durability.