ARP 12pt Hardware Kit

2010–2025 Universal Fitment for Automotive, Marine, and Trailer Applications

Part #: 671-1003

Overview

The ARP 12pt Hardware Kit is a premium fastener solution designed for automotive enthusiasts, builders, and professionals who demand the highest quality hardware for their projects. Whether you're assembling a high-performance engine, upgrading your vehicle's components, or working on marine or trailer applications, these ARP chromoly bolts provide exceptional strength and durability. Engineered with precision and built to withstand demanding conditions, this hardware kit ensures a secure and reliable fitment every time.

Ideal for those seeking to enhance safety margins and achieve professional-grade assembly, the ARP 12pt Hardware Kit offers peace of mind with its superior tensile strength and heat-treated construction. Its versatile design makes it suitable for a wide range of applications, from engine rebuilds to custom fabrication projects. With ARP's reputation for quality and innovation, you'll get hardware that supports your vehicle's performance and longevity.

Key Features

The ARP 12pt Hardware Kit stands out with its high-quality materials and meticulous manufacturing process. Here are some of its key features:

• Constructed from 8740 chromoly steel, known for its exceptional strength and toughness, ensuring long-lasting performance under stress.
• Heat-treated to a tensile strength of 180,000 psi, providing a significant safety margin over standard Grade 8 hardware, ideal for high-stress applications.
• Black oxide finish offers corrosion resistance and a sleek, professional appearance, suitable for both performance builds and restoration projects.
• Designed with a 12-point (12pt) head configuration, allowing for easier installation and removal in tight spaces, and providing better torque transfer compared to standard hex heads.
• Available in a wide range of thread sizes and lengths to accommodate various fastener needs across different vehicle and equipment types.
• Precision-machined to strict tolerances, ensuring proper fitment and reducing the risk of stripping or cross-threading.
• Suitable for automotive, marine, trailer, and industrial applications where high-strength fasteners are required.
• Compatible with standard tools, making installation straightforward for both professional mechanics and DIY enthusiasts.
• Designed to support demanding environments, including high-performance engines, off-road vehicles, and heavy-duty machinery.

Construction & Design

The ARP 12pt Hardware Kit is crafted from 8740 chromoly steel, a material renowned for its superior strength-to-weight ratio and resilience. The fasteners undergo a proprietary heat-treating process that enhances their tensile strength to 180,000 psi, ensuring they can handle extreme loads and vibrations. The black oxide finish not only provides corrosion resistance but also reduces glare and adds a professional aesthetic to your assembly.

The 12-point head design allows for better grip and torque application, especially in tight or hard-to-reach areas. This design minimizes the risk of cam-out and allows for easier socket engagement, saving time during installation and removal. Each bolt is machined to precise specifications, ensuring a perfect fit and reliable performance in critical applications.

Performance & Reliability

With its high-grade chromoly construction and heat treatment, the ARP 12pt Hardware Kit offers unmatched strength and durability. These fasteners are engineered to support demanding automotive builds, including high-performance engines, turbocharged setups, and off-road vehicles subjected to harsh conditions. The robust design helps prevent fastener failure, ensuring your assembly remains secure under extreme stresses.

Installation & Fitment

The ARP 12pt Hardware Kit is designed for straightforward, bolt-on installation. Its compatibility with standard tools makes it accessible for both professional technicians and DIY enthusiasts. No special modifications or tools are required beyond typical socket sets. The fasteners are suitable for a wide range of applications, including engine assembly, mounting brackets, and structural components. Always verify thread sizes and lengths to ensure proper fitment for your specific project.

• Easy to install with standard socket tools
• No cutting, drilling, or special modifications needed
• Suitable for high-stress automotive, marine, and industrial applications

What's Included

• Complete set of high-strength ARP chromoly bolts in various sizes as specified for your application
• All necessary hardware components for installation
• Comprehensive instructions for proper torque and assembly

Ideal For

• Automotive enthusiasts and professionals building or repairing high-performance engines
• Marine applications requiring corrosion-resistant fasteners
• Trailer and heavy-duty equipment assembly
• Custom fabrication projects demanding reliable, high-strength hardware

Emissions Note

This hardware kit is intended for use in non-emissions-critical applications. Always verify compatibility with your local regulations and ensure proper installation procedures are followed for safety and performance.