ARP Nut Kits

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX 1/2˝-13 Stainless Steel Nut Kit

Part #: 401-8302

Overview

The ARP Nut Kits are precision-engineered fasteners designed for automotive enthusiasts who demand the highest quality and durability. Crafted from aerospace-grade materials, these nuts provide a reliable solution for securing critical components in your vehicle. Whether you're building a high-performance street car, participating in motorsports, or performing routine maintenance, these nuts ensure a secure fit and long-lasting performance.

Ideal for applications requiring 1/2˝-13 thread sizes, the ARP Nut Kits are engineered to withstand extreme conditions and high stress. Their robust construction helps support increased horsepower and torque, making them a trusted choice for performance-oriented builds. With their polished finish and aerospace-quality material, these nuts not only perform exceptionally but also add a sleek, professional look to your engine bay or chassis assembly.

Key Features

The ARP Nut Kits incorporate several advanced features that set them apart from standard fasteners:

• Manufactured from aerospace-quality stainless steel, providing excellent strength and corrosion resistance for long-term durability.
• Designed with a 12-point style head, allowing for easier installation and removal in tight spaces while providing a secure grip with a wrench.
• Rated at 180,000 psi tensile strength, ensuring they can handle high-stress applications without failure.
• Polished finish enhances corrosion resistance and provides a professional, high-quality appearance.
• Compatible with standard 9/16 in. wrenches, making installation straightforward with common tools.
• Does not include washers, allowing for custom configurations or use with existing hardware.
• Made specifically for high-performance applications where strength and reliability are critical.

Construction & Design

The ARP Nut Kits are meticulously manufactured using aerospace-grade stainless steel, ensuring exceptional strength and resistance to corrosion. The 12-point design provides increased wrench engagement, reducing the risk of stripping and allowing for easier tightening in confined spaces. The polished finish not only enhances aesthetic appeal but also adds an extra layer of protection against rust and corrosion, making these nuts suitable for both indoor and outdoor use.

Designed with precision and durability in mind, these nuts are ideal for securing critical components such as cylinder heads, intake manifolds, and suspension parts. Their high tensile strength ensures they can withstand the rigors of high-performance driving, racing, or off-road conditions, providing peace of mind that your vehicle's fasteners will hold under extreme stress.

Installation & Fitment

The ARP Nut Kits are designed for straightforward, bolt-on installation. They fit standard 1/2˝-13 threaded studs and bolts, making them compatible with a wide range of automotive applications. No special tools or modifications are required beyond a standard wrench set. Their 12-point head design allows for easy tightening and removal, even in tight or hard-to-reach areas. These nuts are suitable for use in various high-stress environments, including engine assemblies, suspension components, and chassis hardware.

Ensure that the threads are clean and properly lubricated if necessary to achieve optimal torque specifications. Always follow manufacturer torque recommendations to prevent over-tightening or damage.

What's Included

• One set of stainless steel 1/2˝-13 nut kits with 12-point heads

Ideal For

• High-performance engine builds
• Motorsports and racing applications
• Off-road vehicles subjected to extreme conditions
• Routine maintenance requiring durable, reliable fasteners