ARP Metric Thread Bolt Kit

Now Available for 2011–2025 Vehicles / Universal Fitment

Part #: 661-1015

Overview

The ARP Metric Thread Bolt Kit (661-1015) offers a premium solution for automotive enthusiasts and professionals seeking high-strength fasteners for a wide range of applications. Whether you're working on a car, boat, or trailer, this bolt kit provides reliable, durable hardware designed to withstand demanding conditions. Crafted from top-quality materials, these bolts ensure your assemblies are secure, safe, and built to last.

Designed for those who demand the best in performance and appearance, the ARP Metric Thread Bolt Kit elevates your project with its superior strength and polished finish. Perfect for both daily drivers and high-performance builds, these fasteners help support increased safety margins and peace of mind during installation and operation.

Key Features

The ARP Metric Thread Bolt Kit is engineered with advanced materials and manufacturing techniques to deliver exceptional performance and durability. Key features include:

• Constructed from specially alloyed “ARP 300” stainless steel and heat-treated 8740 chrome moly steel, providing a tensile strength of 180,000 psi, significantly surpassing standard Grade 8 hardware.
• Black oxide finish enhances corrosion resistance and provides a sleek, professional appearance that complements any engine bay or mechanical assembly.
• Precision-machined threads ensure a perfect fit and consistent torque application, reducing the risk of stripping or failure.
• Designed for easy installation with standard metric thread sizes, compatible with a wide range of vehicles and applications.
• Heat-treated for increased strength and longevity, making these bolts ideal for high-stress environments.
• Polished finish not only looks great but also helps resist rust and corrosion, maintaining their appearance over time.
• Suitable for use in engine components, suspension systems, or any application requiring high-strength fasteners.

Construction & Design

The ARP Metric Thread Bolt Kit features a robust construction utilizing premium materials that are carefully heat-treated to optimize strength and durability. The alloyed “ARP 300” stainless steel offers excellent corrosion resistance and a polished appearance, making it suitable for both performance and aesthetic purposes. The chrome moly bolts are heat-treated to achieve a tensile strength of 180,000 psi, ensuring they can handle high loads and stresses without failure.

The precision-machined threads and high-quality manufacturing processes guarantee a consistent, reliable fit. The black oxide finish provides additional corrosion resistance while giving the fasteners a sleek, professional look. These design choices make the ARP bolts an excellent choice for enthusiasts who want both performance and appearance in their hardware.

Performance & Reliability

With a tensile strength rating of 180,000 psi, the ARP Metric Thread Bolt Kit offers a substantial safety margin over standard hardware, making it suitable for high-performance applications where strength and reliability are critical. The heat-treated chrome moly bolts are designed to withstand extreme conditions, including high temperatures and mechanical stresses, ensuring your components stay securely fastened over time.

While these bolts are not specifically rated for racing or off-road use, their high-quality construction makes them ideal for street, performance, and general mechanical applications where strength and durability are paramount. Their corrosion-resistant finish helps maintain their appearance and integrity in harsh environments.

Installation & Fitment

The ARP Metric Thread Bolt Kit is designed for straightforward, bolt-on installation. The precise metric threads ensure a secure fit with compatible components, and no special tools beyond standard wrenches are required. These bolts are compatible with a wide range of vehicles and applications, making them versatile for various projects.

Installation is quick and easy, with no need for cutting, drilling, or special modifications. The high-quality threads and materials ensure a smooth installation process and long-lasting performance. Always follow torque specifications recommended for your application to ensure optimal safety and performance.

What's Included

• Complete set of high-strength metric bolts in various sizes as specified by the kit
• Premium hardware designed for durability and corrosion resistance
• Instruction sheet for proper installation and torque guidelines

Ideal For

• Automotive enthusiasts performing engine or chassis upgrades
• Professionals requiring reliable, high-strength fasteners for mechanical assemblies
• Marine and trailer applications needing corrosion-resistant hardware
• High-performance builds demanding safety and durability

Emissions Note

This product is designed for use in non-emissions-critical applications. Please verify compatibility with your local regulations before installation. ARP fasteners are intended for off-road, racing, or show use only where legal.