Holley Aluminum Swivel Water Neck

1966–2006 Dodge Challenger, Dodge Charger, Dodge Dakota, Dodge Ramcharger, Jeep Wrangler Gen III Hemi Engines

97-343

Overview:

The Holley Aluminum Swivel Water Neck is a precision-engineered cooling system component designed specifically for Mopar Gen III Hemi engines. Ideal for enthusiasts performing engine swaps or custom cooling setups, this water neck features a swivel design that allows for easy adjustment to fit custom radiator hoses. Its versatile fitment covers a wide range of Dodge and Jeep models from 1966 through 2006, making it a reliable upgrade for classic muscle cars, trucks, and off-road vehicles.

With its durable billet aluminum construction and sleek black anodized finish, this water neck not only enhances engine bay aesthetics but also provides excellent corrosion resistance for long-lasting performance. Whether you’re restoring a vintage Dodge Charger or upgrading a Jeep Wrangler’s cooling system, this component offers both functionality and style.

Key Features:

Designed to meet the demands of high-performance Mopar Gen III Hemi engines, the Holley Aluminum Swivel Water Neck offers several key benefits:

• Compatible with all 2003 and newer 5.7L, 2005–2010 6.1L, and 2011 and up 6.4L Gen III Hemi engines
• Fits a broad range of vehicles including Dodge Challenger (1970–1974), Dodge Charger (1966–1974), Dodge Dakota (1987–2004), Dodge Ramcharger (1974–1993), and Jeep Wrangler (1987–2006)
• Swivel design allows 360-degree rotation before tightening, enabling precise hose alignment and fitment
• Available in 45-degree or 90-degree outlet angles to accommodate various radiator hose routing needs
• Constructed from billet aluminum for strength and durability
• Black anodized finish provides superior corrosion resistance and a clean, professional look
• Designed to fit 1-3/4” radiator hoses, a common size for performance cooling systems
• Includes high-quality M8 x 1.25mm x 30mm bolts for secure installation
• Ideal for engine swaps and custom cooling system applications

Construction & Design:

The Holley Aluminum Swivel Water Neck is crafted from premium billet aluminum, ensuring a lightweight yet robust component capable of withstanding the rigors of high-temperature engine environments. The black anodized finish not only enhances corrosion resistance but also adds a sleek, durable surface that resists wear and fading over time.

The swivel mechanism is engineered to rotate a full 360 degrees before the mounting bolts are tightened, allowing for precise adjustment of the outlet angle. This flexibility simplifies hose routing in custom or tight engine bays, reducing stress on hoses and improving overall cooling system reliability.

Installation & Fitment:

Installation of the Holley Aluminum Swivel Water Neck is straightforward and designed to integrate seamlessly with Mopar Gen III Hemi engines. It bolts directly onto the factory water neck mounting points using the included M8 bolts. The swivel feature allows you to position the outlet at the optimal angle for your radiator hose setup, minimizing the need for hose modifications or adapters.

This water neck fits a wide range of Dodge and Jeep models equipped with Gen III Hemi engines, including classic muscle cars and trucks from 1966 through 2006. Its compatibility with multiple engine sizes and vehicle platforms makes it an excellent choice for restorations, performance upgrades, and engine swaps.

What's Included:

• One Holley Aluminum Swivel Water Neck (45-degree outlet)
• Two M8 x 1.25mm x 30mm long mounting bolts

Ideal For:

This water neck is perfect for automotive enthusiasts, mechanics, and custom builders working on Mopar Gen III Hemi engine projects. Whether you are performing an engine swap, upgrading your cooling system, or restoring a classic Dodge or Jeep, the Holley Aluminum Swivel Water Neck offers the adjustability and durability needed for a professional-quality installation.

It is especially beneficial for those who require flexible hose routing options in tight or modified engine bays, ensuring a clean and efficient cooling system setup without compromising on style or performance.

Holley is a cornerstone name in performance, spanning everything from classic carburetion to modern EFI, fuel systems, and race-ready supporting components. It’s also home to a roster of iconic sub-brands across ignition, exhaust, and drivetrain—making Holley a one-stop ecosystem for builders chasing better drivability, more power, and proven track heritage.