Holley Aluminum Swivel Water Neck

1966–2006 Dodge / Jeep Models with Gen III Hemi Engines

97-341

Overview:

The Holley Aluminum Swivel Water Neck is a precision-engineered cooling system component designed specifically for Mopar Gen III Hemi engines. Perfect for enthusiasts performing engine swaps or custom cooling setups, this water neck features a swivel design that allows for easy adjustment to fit a variety of radiator hose configurations. Its durable billet aluminum construction with a sleek black anodized finish not only enhances engine bay aesthetics but also provides excellent corrosion resistance, ensuring long-lasting performance.

Compatible with a wide range of Dodge and Jeep models from 1966 through 2006, this water neck is an ideal upgrade for those looking to maintain optimal cooling efficiency while accommodating custom installations.

Key Features:

Engineered for versatility and durability, the Holley Aluminum Swivel Water Neck offers several key benefits:

• Black anodized finish for superior corrosion protection and a clean, professional look
• Swivel design allows 360-degree rotation before tightening, enabling precise hose alignment
• Available in 90-degree or 45-degree outlet angles to suit different radiator hose routing needs
• Fits standard 1-3/4” radiator hoses commonly used on Gen III Hemi engines
• Constructed from lightweight, high-strength billet aluminum for durability and heat resistance
• Includes two M8 x 1.25mm x 30mm long bolts for secure installation
• Compatible with all 2003 and newer 5.7L, 2005–2010 6.1L, and 2011 and up 6.4L Gen III Hemi engines
• Ideal for engine swaps and custom cooling system setups requiring flexible hose positioning

Construction & Design:

Crafted from premium billet aluminum, the Holley Swivel Water Neck combines strength and lightweight properties essential for high-performance applications. The black anodized finish not only enhances corrosion resistance but also adds a refined appearance that complements any engine bay. The swivel mechanism is precisely machined to allow smooth 360-degree rotation, providing maximum flexibility during installation without compromising the seal or durability.

This robust design ensures reliable operation under the demanding conditions of performance engines, while the included hardware guarantees a secure and leak-free fitment.

Installation & Fitment:

Installation is straightforward for anyone familiar with cooling system components. The water neck bolts directly onto the Gen III Hemi engine’s water outlet, replacing the factory neck. Thanks to the swivel feature, you can adjust the outlet angle to perfectly align with your custom radiator hoses, minimizing stress and potential leaks. This product fits a broad range of Dodge and Jeep vehicles equipped with Gen III Hemi engines, including:

• Dodge Challenger (1970–1974)
• Dodge Charger (1966–1974)
• Dodge Dakota (1987–2004)
• Dodge Ramcharger (1974–1993)
• Jeep Wrangler (1987–2006)

No major modifications are typically required, making it an excellent choice for both restoration projects and performance builds.

What's Included:

• One Holley Aluminum Swivel Water Neck (90-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 with Mopar Gen III Hemi engines. Whether you’re performing an engine swap, upgrading your cooling system, or restoring a classic Dodge or Jeep, this component offers the flexibility and durability needed to ensure a reliable and clean installation. Its adjustable swivel design makes it especially valuable for custom radiator hose routing and tight engine bay configurations.

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.