ARP Head Stud Kits

Multiple Subaru Fitments (260-4702)

Part #: 260-4702

Overview

The ARP Head Stud Kit is a high-performance fastening solution designed specifically for Subaru engines. Engineered for enthusiasts who demand durability and precision, these head studs provide a reliable clamping force essential for maintaining proper cylinder head gasket seal under high-performance conditions. Whether you're building a turbocharged setup, pushing your Subaru to its limits on the street or track, or simply upgrading your engine's reliability, this kit offers the strength and consistency you need.

Constructed from premium materials and manufactured with meticulous attention to detail, the ARP Head Stud Kit ensures your engine maintains proper compression and prevents head gasket failure during spirited driving or heavy loads. These studs are ideal for both daily drivers and race applications, providing peace of mind and enhanced performance.

Key Features

The ARP Pro Series Head Stud Kit features advanced materials and precision manufacturing techniques to deliver superior strength and reliability. Key features include:

• Material: Made from 8740 chromoly steel, offering exceptional tensile strength rated at 190,000 psi, ensuring the fasteners can withstand extreme engine conditions.
• Design: Equipped with 12-point heads for easy installation and removal, even in tight engine bays, and available with hex or 12-point head options to suit your preference.
• Threading & Machining: Cold-forged to ensure molecular integrity, with heat treatment prior to thread rolling and machining for maximum strength and durability.
• Load Distribution: Comes complete with hardened parallel washers that promote even load distribution across the cylinder head, reducing the risk of warping or gasket failure.
• Compatibility: Designed for multiple Subaru models, including various years and engine configurations, ensuring a perfect fit for your application.
• Complete Kit: All necessary components included for a straightforward installation, providing a reliable upgrade over stock fasteners.
• Precision & Quality: Manufactured to strict standards, ensuring consistent torque readings and long-lasting performance.

Construction & Design

The ARP Head Stud Kit is built with durability and precision at its core. The fasteners are crafted from 8740 chromoly steel, a material renowned for its high tensile strength and toughness. The cold-forging process aligns the grain structure of the steel, maximizing strength and fatigue resistance. Heat treatment further enhances the material's properties, ensuring the studs can withstand the intense pressures and thermal cycles within a high-performance engine.

The 12-point head design allows for easier wrench access in confined spaces, facilitating installation and removal. The inclusion of hardened parallel washers ensures that load is evenly distributed across the cylinder head, minimizing the risk of warping or gasket blowout. These design features collectively contribute to a secure, reliable fastening solution that maintains proper head gasket sealing even under demanding conditions.

Performance & Reliability

While not explicitly rated with specific horsepower gains, the ARP Head Stud Kit significantly improves the engine's ability to maintain proper compression and sealing under high stress. By replacing weaker factory fasteners with these high-strength studs, you reduce the risk of head gasket failure, especially in boosted or high-compression setups. The robust construction ensures consistent torque retention and long-term reliability, making it a trusted choice for performance builds and rebuilds.

Installation & Fitment

The ARP Head Stud Kit is designed for a straightforward, bolt-on installation. It replaces the factory head bolts with high-strength studs that thread directly into the engine block. No special modifications, cutting, or drilling are required. Proper torque specifications should be followed during installation to ensure optimal clamping force and sealing. It's recommended to use ARP's assembly lubricant to achieve accurate torque readings and prevent thread galling.

• Designed for use with Subaru engines across multiple model years and configurations.
• Intended for professional or experienced DIY installation.
• No cutting, drilling, or tuning is necessary.

What's Included

• Complete set of high-strength chromoly steel head studs
• Hardened parallel washers
• Installation instructions

Ideal For

• High-performance Subaru engine builds
• Turbocharged or naturally aspirated applications requiring increased clamping force
• Engine rebuilds aiming for enhanced durability and reliability
• Enthusiasts seeking a professional-grade fastening solution for daily driving or racing

Emissions Note

This product is designed for off-road or racing use only and may not be legal for use on public roads in all jurisdictions. Please check local regulations before installation.