ARP 12pt Hardware Kit

2010–2025 Subaru WRX / Subaru STI 2.0L Turbo / 2.5L Turbo

Part #: 673-1004

Overview

The ARP 12pt Hardware Kit is a high-quality fastener solution designed for automotive enthusiasts and professionals who demand durability and reliability in their builds. Whether you're assembling a performance engine, upgrading your suspension, or securing critical components, these premium bolts ensure a secure and lasting connection. Crafted from top-grade materials, this hardware kit provides the strength and precision needed for demanding applications, giving you confidence in every drive.

Ideal for both street and performance use, the ARP 12pt Hardware Kit helps support increased safety margins and peace of mind during intense driving conditions. Its robust construction and heat-treated finish make it suitable for a wide range of automotive projects, from daily drivers to race cars. If you value quality, strength, and consistency, this hardware kit is an essential addition to your toolkit.

Key Features

The ARP 12pt Hardware Kit offers a combination of advanced materials and meticulous engineering to deliver superior performance and durability. Key features include:

• Constructed from ARP's proprietary 8740 chromoly steel, known for its exceptional strength and toughness, ensuring reliable fastening under high stress.
• Heat-treated to a tensile strength of 180,000 psi, providing a substantial safety margin over standard Grade 8 hardware, ideal for high-performance applications.
• Black oxide finish enhances corrosion resistance and provides a sleek, professional appearance.
• Designed with a 12-point head configuration, allowing for increased torque application and easier installation in tight spaces.
• Available in a wide range of thread sizes and styles, making it versatile for various automotive needs, including engine assembly, suspension, and chassis components.
• Precision-machined to strict tolerances for a perfect fit and reliable torque retention.
• Suitable for use on cars, boats, and trailers, making it a versatile choice for multiple projects.
• Manufactured by ARP, a trusted leader in high-performance fasteners with decades of experience in motorsports and automotive manufacturing.
• Designed to provide a significant safety margin, helping prevent fastener failure during demanding driving conditions.

Construction & Design

The ARP 12pt Hardware Kit is engineered with durability and precision at its core. Made from ARP's renowned 8740 chromoly steel, these fasteners undergo a proprietary heat-treating process that enhances their tensile strength and toughness. The black oxide finish not only adds corrosion resistance but also reduces glare and provides a professional look. The 12-point head design allows for increased torque application and easier access in confined spaces, making installation straightforward even in tight engine bays or chassis areas. Each bolt is machined to exact specifications, ensuring a perfect fit and consistent performance across the entire kit. This attention to detail ensures that your vehicle's critical components are securely fastened, reducing the risk of failure and extending the lifespan of your assembly.

Performance & Reliability

While this hardware kit is not rated for specific horsepower gains, its high tensile strength and superior construction make it an excellent choice for supporting high-performance modifications and demanding driving conditions. Using ARP fasteners can help prevent fastener stretch or failure, especially in high-stress environments such as forced induction setups or racing applications. The black oxide finish provides additional corrosion resistance, ensuring long-term reliability even in harsh conditions. Trust ARP's proven track record in motorsports and automotive performance to deliver fasteners that meet or exceed OEM standards, giving you confidence in your build's integrity.

Installation & Fitment

The ARP 12pt Hardware Kit is designed for easy, bolt-on installation. Its precision-machined threads and compatible head design ensure a straightforward process, often requiring only standard hand tools. No special modifications, cutting, or drilling are necessary for most applications. Proper torque specifications should be followed to ensure optimal clamping force and safety. Whether you're assembling an engine, securing suspension components, or performing general hardware upgrades, this kit provides a reliable and professional-grade fastening solution.

• Easy to install with common hand tools
• No cutting, drilling, or special tuning required
• Suitable for use on a wide range of automotive and marine applications

What's Included

• Complete set of high-strength ARP chromoly bolts in various sizes and thread pitches
• All necessary hardware components for a comprehensive installation
• Instruction sheet for proper torque and installation procedures

Ideal For

• Performance engine builds and upgrades
• High-stress automotive applications
• Race cars, street performance, and off-road vehicles
• Marine and trailer applications requiring durable fasteners

Emissions Note

This product is designed for automotive use and meets or exceeds industry standards for strength and durability. However, it is not certified for emissions compliance and is intended for off-road or racing applications only. Always verify local regulations before use in street vehicles.