ARP Nut Kits

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX / Subaru STI 3/8˝-16 Stainless Steel Nut Kit

Part #: 401-8341

Overview

The ARP Nut Kits are precision-engineered fasteners designed for automotive enthusiasts who demand the highest quality and reliability. Crafted from aerospace-grade materials, these nuts provide a secure and durable connection for various performance applications. Whether you're building a high-performance street car, participating in racing events, or restoring a classic, these nuts ensure your hardware stays tight under demanding conditions.

Ideal for use in engine builds, suspension setups, or any custom fabrication where strength and precision are critical, ARP Nut Kits help support increased horsepower and torque by maintaining secure fastenings. Their polished finish not only provides corrosion resistance but also adds a professional look to your engine bay or chassis assembly.

Key Features

ARP Nut Kits are known for their exceptional quality and engineering excellence. The 12-point style heads allow for easy installation and removal in tight spaces, making them a favorite among professional builders and DIY enthusiasts alike. Made from stainless steel, these nuts offer excellent corrosion resistance, ensuring longevity and consistent performance over time.

• Constructed from aerospace-quality stainless steel rated at 180,000 psi tensile strength, providing superior durability and holding power.
• 12-point nut style allows for increased wrench engagement, facilitating installation in confined areas.
• Polished finish enhances corrosion resistance and provides a clean, professional appearance.
• Designed without nylon inserts or self-locking features, these nuts rely on their high tensile strength and proper torque specifications for secure fastening.
• Compatible with standard 3/8˝-16 threaded fasteners, suitable for a wide range of automotive applications.
• Includes washers for added load distribution and secure fitment (if applicable, based on product design).
• Rated at 180,000 psi tensile strength, ensuring reliable performance even under high-stress conditions.

Construction & Design

The ARP Nut Kits are meticulously manufactured from aerospace-grade stainless steel, ensuring exceptional strength and corrosion resistance. The 12-point head design provides increased wrench engagement, which simplifies installation and removal in tight or hard-to-reach spaces. The polished finish not only enhances aesthetic appeal but also helps prevent rust and corrosion, extending the lifespan of the fasteners.

These nuts are engineered to withstand the rigors of high-performance driving, racing, and off-road environments. Their high tensile strength ensures they maintain clamping force under extreme loads, making them a reliable choice for critical applications. The precise threading and manufacturing tolerances guarantee a perfect fit with compatible bolts and studs, reducing the risk of stripping or loosening over time.

Installation & Fitment

Installing the ARP Nut Kits is straightforward, thanks to their standard 3/8˝-16 thread size and 12-point head design. They are intended to be used with compatible ARP bolts or studs, and no special tools beyond a standard wrench are required. Ensure that you torque these nuts to the manufacturer's specifications to achieve optimal clamping force and safety. These nuts are designed for bolt-on applications, with no cutting, drilling, or special modifications needed.

• Compatible with 3/8˝-16 threaded fasteners commonly used in automotive applications.
• Easy to install with standard hand tools.
• No additional hardware or modifications required.

What's Included

• Complete set of stainless steel 12-point nuts
• Washers (if included or applicable)
• Installation instructions (if provided)

Ideal For

• High-performance engine builds
• Suspension and chassis assembly
• Racing and track applications
• Restoration projects requiring high-strength fasteners
• Enthusiasts seeking durable, corrosion-resistant hardware