ARP Thermostat Hsg Bolt Kit

Multiple Ford Fitments 2011–2025

Part #: 155-7401

Overview

The ARP Thermostat Housing Bolt Kit is a high-quality fastener solution designed specifically for securing your vehicle's water neck and thermostat housing. Engineered with precision and durability in mind, this kit ensures a reliable and secure connection in your engine's cooling system. Whether you're performing routine maintenance or a full engine rebuild, these bolts provide the peace of mind that comes with trusted ARP quality.

This bolt kit is ideal for automotive enthusiasts, professional mechanics, and DIYers who demand top-tier hardware that withstands the rigors of high-performance driving, off-road adventures, or daily commuting. By choosing ARP fasteners, you benefit from improved strength, corrosion resistance, and consistent quality, helping to support the longevity and reliability of your engine's cooling components.

Key Features

Designed to properly secure your water neck and thermostat housing, the ARP Thermostat Hsg Bolt Kit offers several technical advantages:

• Material Excellence: Crafted from chromoly steel, these fasteners deliver exceptional strength and durability, resisting stretching and fatigue under high-temperature conditions.
• Finish Options: Available in black oxide or polished stainless steel, allowing you to choose the finish that best matches your engine bay aesthetics and corrosion resistance needs.
• Design Precision: Features a 12-point head style for easy installation and removal, even in tight spaces, with a 2.250-inch underhead length for optimal fitment.
• Complete Installation: Includes washers to ensure a secure and leak-free connection, reducing the risk of bolt loosening over time.
• Compatibility: Designed to fit multiple Ford applications from 2011 to 2025, making it a versatile choice for a range of models and engine configurations.
• Enhanced Reliability: ARP's high-quality fasteners help prevent stripping and failure, providing a long-lasting solution for your cooling system.

Construction & Design

The ARP Thermostat Housing Bolt Kit is meticulously manufactured from chromoly steel, a material renowned for its high tensile strength and resistance to heat and corrosion. The bolts feature a black oxide finish, which offers additional protection against rust and environmental elements, or an optional polished stainless steel finish for a sleek, corrosion-resistant appearance. The 12-point head design allows for increased torque application and easier access in confined engine bay spaces, ensuring a secure fitment.

Each fastener includes washers to distribute load evenly and prevent damage to the thermostat housing or water neck. The precise underhead length of 2.250 inches ensures compatibility with a variety of Ford models, providing a snug and secure fitment that maintains proper sealing and prevents leaks. ARP's manufacturing process involves strict quality control and precision machining, resulting in fasteners that meet or exceed OEM standards for strength and durability.

Performance & Reliability

While this kit is not designed to increase horsepower directly, using high-quality ARP fasteners ensures the integrity of your cooling system under demanding conditions. Properly secured thermostat housings and water necks help prevent leaks, overheating, and potential engine damage. The robust construction and corrosion-resistant finishes contribute to long-term reliability, especially in high-temperature or off-road environments where standard hardware might fail.

Installation & Fitment

The ARP Thermostat Hsg Bolt Kit offers a straightforward, bolt-on installation process. These fasteners are designed to replace OEM hardware directly, with no modifications required. The 12-point head design facilitates installation with standard tools, even in tight engine compartments. No cutting, drilling, or special tuning is necessary, making this kit suitable for both professional repairs and DIY projects. Proper torque specifications should be followed to ensure optimal sealing and fastening strength.

• Easy, direct replacement for factory bolts
• No cutting or drilling required
• Suitable for use in high-performance and daily-driven vehicles

What's Included

• Set of chromoly steel bolts with 12-point heads
• Washers for each bolt
• Installation instructions

Ideal For

• Automotive enthusiasts performing engine rebuilds or upgrades
• Professional mechanics seeking reliable, high-strength fasteners
• Off-road drivers and high-performance vehicle owners
• DIYers looking for durable hardware to secure cooling system components

Emissions Note

This product is designed for use in vehicles that comply with local emissions regulations. Please verify compatibility with your specific application and local laws before installation. ARP fasteners are intended for use in street, off-road, or race environments as permitted by law.