ARP Pro Series Head Stud Kits

1990–2005 Acura NSX 3.0L / 3.2L

Part #: 208-4309

Overview

The ARP Head Stud Kit for the Acura NSX is a high-quality, performance-oriented fastener solution designed to enhance the durability and reliability of your engine's cylinder head assembly. Crafted by ARP, a renowned leader in fastener technology, this kit is ideal for enthusiasts looking to build or rebuild their NSX engine with components that can withstand increased power and demanding conditions. Whether you're restoring a classic or preparing for performance upgrades, these head studs provide a secure, consistent clamping force that helps prevent head gasket failure and maintains proper cylinder head alignment under high-stress scenarios.

Designed for street, spirited driving, and track use, this ARP Pro Series kit ensures your engine maintains optimal compression and sealing, supporting increased horsepower and torque. The precision engineering and superior materials used in these studs contribute to improved engine longevity and performance, making them a trusted choice for serious NSX enthusiasts and professional rebuilders alike.

Key Features

ARP Pro Series Head Stud Kits incorporate advanced manufacturing techniques and high-grade materials to deliver unmatched strength and durability. Key features include:

• Made from cold-forged 8740 chromoly steel, ensuring high tensile strength and molecular integrity for maximum load capacity.
• Heat-treated prior to thread rolling and machining, providing consistent hardness and resilience under extreme conditions.
• Complete with hardened parallel washers that distribute load evenly across the cylinder head, reducing the risk of warping or uneven tightening.
• Available with 12-point nuts for enhanced wrench access and secure fastening, ensuring proper torque application.
• Engineered specifically for the Acura NSX 3.0L and 3.2L engines from 1990 to 2005, ensuring a perfect fit and reliable performance.
• Designed to support high-performance builds, including forced induction or increased compression setups.
• Manufactured to meet or exceed OEM standards, providing peace of mind during engine assembly or rebuilds.
• All studs are precision-machined to exact specifications, ensuring consistent thread engagement and accurate torque readings.
• Suitable for both professional engine builders and DIY enthusiasts seeking a high-quality, reliable fastener solution.

Construction & Design

The ARP Head Stud Kit features a robust construction utilizing cold-forged 8740 chromoly steel, a material known for its exceptional strength-to-weight ratio and fatigue resistance. The studs undergo a meticulous heat-treating process that enhances their hardness and molecular stability, ensuring they maintain their integrity even under high-stress conditions. The design includes precision-machined threads and a smooth, consistent surface finish to facilitate easy installation and accurate torque application.

The inclusion of hardened parallel washers ensures even load distribution across the cylinder head, minimizing the risk of warping or gasket failure. The 12-point nuts provide increased wrench access, allowing for easier tightening in tight engine bays and ensuring a secure, vibration-resistant fit. Overall, the design emphasizes durability, precision, and ease of installation, making these studs a reliable upgrade for your NSX engine.

Installation & Fitment

The ARP Head Stud Kit is designed for straightforward, bolt-on installation with no need for special modifications. The studs are compatible with the OEM cylinder head and engine block, fitting perfectly within the specified model years and engine types. Proper torque specifications should be followed as per ARP's instructions to ensure optimal clamping force and sealing. No additional machining or cutting is required, making this kit suitable for both professional rebuilds and DIY projects.

• Easy to install with standard hand tools.
• Requires proper torque sequence and specifications for optimal results.
• Designed to withstand high-performance engine conditions without deformation or failure.

What's Included

• Set of high-strength ARP Pro Series cylinder head studs
• Hardened parallel washers
• 12-point nuts (if specified in the kit)
• Installation instructions and torque specifications

Ideal For

• Engine rebuilds and restorations for Acura NSX 3.0L / 3.2L engines
• High-performance street and track applications
• Enthusiasts seeking reliable, durable fasteners for increased power setups
• Professional engine builders and tuners