ARP High Performance Series Head Bolt Kit

Multiple Ford Fitments 2011–2025 / Ford Engines

Part #: 155-3603

Overview

The ARP Head Bolt Kit is designed for automotive enthusiasts and professional rebuilders seeking reliable, high-strength fasteners for Ford engines. Engineered with durability and precision in mind, these head bolts are ideal for performance applications, engine rebuilds, and high-stress environments. Whether you're restoring a classic or building a high-performance street or race engine, ARP's head bolt kits provide the confidence and strength needed to ensure proper cylinder head retention and optimal engine performance.

Constructed from premium materials and featuring advanced manufacturing processes, these head bolts help support increased horsepower and torque, while maintaining excellent reliability over countless miles and demanding conditions. With ARP's reputation for quality and innovation, you can trust these fasteners to deliver consistent, repeatable results for your Ford engine build.

Key Features

ARP High Performance Series head bolt kits incorporate several key features that set them apart from standard fasteners. Crafted from high-strength chromoly steel, these bolts are rated at an impressive 180,000 psi, making them 15 percent stronger than traditional Grade 8 fasteners. This increased tensile strength ensures that your cylinder heads remain securely fastened under high boost, elevated compression, or spirited driving conditions.

• Material & Finish: Made from durable chromoly steel with a black oxide finish for corrosion resistance and a sleek appearance.
• Design & Compatibility: Available with either a reduced wrenching hex head or a 12-point head, facilitating easier installation and re-torqueing without removing valvetrain components.
• Included Washers: Comes complete with high-quality washers to ensure proper load distribution and secure fitment.
• Fastener Style: Bolt-style fasteners designed for maximum clamping force and reliability.
• Application Versatility: Suitable for multiple Ford engines across various model years, making them a versatile choice for many rebuild projects.

Construction & Design

These ARP head bolts feature a one-piece, precision-machined design that guarantees consistent thread engagement and optimal clamping force. The chromoly steel construction provides exceptional strength and fatigue resistance, essential for maintaining cylinder head integrity during high-performance operation. The black oxide finish not only enhances corrosion resistance but also reduces glare in the engine bay, maintaining a clean, professional appearance.

The reduced wrenching hex head design allows for easier installation and removal, especially in tight engine bays or when working with multiple fasteners. The 12-point head option offers increased torque application and better access in confined spaces. ARP's meticulous manufacturing process, including proprietary heat treating and quality control, ensures each fastener meets strict performance standards, providing peace of mind during assembly and operation.

Installation & Fitment

Installing these ARP head bolts is straightforward for experienced mechanics and DIY enthusiasts alike. They are designed as direct bolt-on replacements for factory fasteners, requiring no modifications or special tools beyond standard socket sets. It is recommended to follow the torque sequence and specifications provided in your engine's service manual to ensure proper head gasket sealing and fastener preload. No cutting, drilling, or complex procedures are necessary, making this a reliable upgrade for your Ford engine rebuild or performance enhancement.

• Easy to install with standard hand tools
• Requires proper torque sequence and specifications for optimal results
• No additional modifications or tuning required

What's Included

• Complete set of high-strength chromoly head bolts
• High-quality washers for each bolt
• Installation instructions and torque specifications

Ideal For

• Engine rebuilds and restorations for Ford vehicles from 2011 to 2025
• High-performance street and race engines
• Enthusiasts seeking reliable, durable fasteners for demanding conditions
• Professional mechanics and DIY rebuilders