ARP Hex Bolt Kits

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX 3/8in - 16 x 1.250 Hex Bolts

Part #: 654-1250

Overview

The ARP Hex Bolt Kits are precision-engineered fasteners designed to provide reliable, high-strength connections for a variety of automotive applications. Crafted by ARP, a leader in high-performance fasteners, these bolts are ideal for enthusiasts and professionals seeking durable, secure hardware for engine builds, suspension components, or other critical assemblies. Whether you're restoring a classic or building a high-performance street or track vehicle, these hex bolts ensure your components stay firmly in place under demanding conditions.

Constructed with ARP's renowned quality standards, these bolts help support increased horsepower and torque, offering peace of mind during spirited driving or heavy-duty use. Their black oxide finish not only provides corrosion resistance but also adds a sleek, professional appearance to your engine bay or chassis. Designed for easy installation with standard wrenches, these bolts are a dependable choice for both OEM replacements and custom modifications.

Key Features

ARP Hex Bolt Kits feature high-quality materials and precision manufacturing to deliver exceptional strength and durability. The 3/8 inch diameter and 16 threads per inch (1.250 inch length) make these bolts versatile for a wide range of automotive fastening needs. The black oxide coating enhances corrosion resistance, ensuring long-lasting performance even in harsh environments.

• Manufactured from high-grade alloy steel for superior strength and fatigue resistance.
• Black oxide finish provides corrosion resistance and a sleek appearance.
• Precisely machined threads for smooth installation and optimal thread engagement.
• Designed to meet or exceed OEM standards for quality and reliability.
• Ideal for engine assembly, suspension, and other critical components requiring high-strength fasteners.
• Packaged in sets of five for convenience and cost-effectiveness during assembly or repair projects.
• Compatible with standard 7/16 inch wrenches for easy installation and removal.
• Engineered to support increased torque loads, helping prevent fastener failure under stress.
• Suitable for use in both street and racing applications where high-performance hardware is essential.

Construction & Design

These ARP hex bolts are crafted from premium alloy steel, ensuring maximum strength and durability. The black oxide coating not only enhances corrosion resistance but also reduces glare and provides a professional finish. The bolts feature a standard hex head design, allowing for straightforward installation with common hand tools. ARP's manufacturing process includes precise machining and quality control to guarantee consistent thread pitch and dimensions, ensuring a secure fit every time. The 1.250-inch length and 3/8-inch diameter make these bolts versatile for various fastening needs across different vehicle models and applications.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward thanks to their standard hex head design. These bolts are intended to replace OEM fasteners or serve as upgrade components in high-performance builds. No special tools beyond a standard 7/16 inch wrench are required. The bolts are designed to fit vehicles with 3/8 inch diameter threaded holes, such as certain Subaru models from 2011 to 2025. Always follow ARP's torque specifications and installation procedures to ensure optimal performance and safety. No cutting, drilling, or additional modifications are necessary for proper installation.

• Easy bolt-on installation with common hand tools.
• Suitable for use in engine, suspension, or chassis applications requiring high-strength fasteners.
• Compatible with OEM or aftermarket components that utilize 3/8 inch - 16 threads.

What's Included

• Five ARP Hex Bolts, 3/8 inch diameter x 1.250 inch length
• High-quality packaging to prevent damage during shipping

Ideal For

• Performance enthusiasts building or upgrading engines and suspensions
• Restorations requiring high-quality fasteners
• Race cars and street vehicles subjected to high stress
• DIY mechanics seeking reliable, durable hardware