ARP Head Stud Kits

Multiple Porsche Fitments 2011–2025

Part #: 204-4707

Overview

The ARP Head Stud Kit from the Pro Series is designed to provide a reliable and high-strength fastening solution for Porsche engines. Engineered for enthusiasts and professional builders alike, these head stud kits ensure optimal clamping force and durability under demanding conditions. Whether you're performing a rebuild, upgrading your engine, or seeking to improve head gasket integrity, this kit offers the performance and peace of mind you need.

Constructed with precision and quality, ARP's Pro Series head studs are ideal for street, spirited driving, and high-performance applications. They help support increased horsepower and torque by maintaining consistent head gasket sealing and preventing head lift during high-RPM operation. With their robust design and superior materials, these studs are a trusted choice for Porsche owners aiming for longevity and performance in their engine builds.

Key Features

The ARP Head Stud Kit boasts several advanced features that set it apart from standard fasteners:

• Manufactured from 8740 chromoly steel, these studs offer exceptional strength and toughness, rated at an impressive 190,000 psi tensile strength, ensuring they withstand extreme engine stresses.
• Cold-forged to ensure molecular integrity, the studs maintain their strength and durability even under high thermal and mechanical loads.
• Heat-treated prior to thread rolling and machining, providing consistent hardness and structural integrity throughout the fastener.
• Designed with a 12-point head style for easy installation and removal, especially in tight engine bays or hard-to-reach areas.
• All kits include hardened parallel washers for even load distribution across the cylinder head, promoting accurate torque readings and preventing uneven stress on the head and block surfaces.
• Available with hex or 12-point head options, allowing customization based on your tool access and preference.
• Engineered specifically for Porsche models from 2011 to 2025, ensuring precise fitment and compatibility with various engine configurations.
• Complete kits come with all necessary components for a straightforward installation, including studs, washers, and nuts.
• Designed to support high-performance builds, racing applications, or any scenario where engine reliability and head gasket sealing are critical.

Construction & Design

The ARP Head Stud Kit is crafted from high-quality 8740 chromoly steel, a material renowned for its strength and fatigue resistance. The studs are cold-forged, a manufacturing process that enhances their molecular structure, resulting in a product that can withstand extreme engine conditions. Heat treatment further enhances the tensile strength, ensuring the studs maintain their integrity during high-RPM operation and thermal cycling.

The design incorporates a 12-point head, which provides increased contact surface and easier access during installation and removal. The inclusion of hardened parallel washers ensures load is evenly distributed across the cylinder head, reducing the risk of warping or uneven sealing. The precise machining and quality control standards adhered to by ARP guarantee a consistent fit and reliable performance across all kits.

Performance & Reliability

These head studs are engineered to support increased engine power and improve overall reliability. By maintaining consistent clamping force, they help prevent head gasket failure, especially in high-performance or forced induction applications. The high tensile strength of the studs ensures they resist stretching or elongation under extreme conditions, providing a secure seal and reducing the likelihood of head lift.

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 cutting, drilling, or special modifications are required, making it suitable for both professional rebuilds and DIY enthusiasts. Proper torque specifications should be followed during installation to ensure optimal clamping force and sealing.

• Designed specifically for Porsche engines from 2011 to 2025
• Compatible with various Porsche models, including Cayenne, Macan, Panamera, and others with suitable engine configurations
• Installation typically involves removing the cylinder head, replacing the bolts with studs, and torquing to manufacturer specifications

What's Included

• Complete set of high-strength head studs
• Hardened parallel washers
• Matching nuts for secure fastening

Ideal For

• High-performance Porsche engine builds
• Engine rebuilds and head gasket repairs
• Racing and spirited driving applications
• Enthusiasts seeking enhanced durability and reliability in their engine assembly

Emissions Note

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