Billet Water Neck 20AN Black

The Billet Water Neck 20AN Black from Allstar Performance is a precision-engineered coolant distribution component designed for custom cooling system builds and high-performance engine modifications. This aluminum water neck serves as the critical junction between your radiator hose and engine block, allowing you to relocate and customize your cooling system plumbing to accommodate aftermarket headers, tight engine bay configurations, or upgraded water pump installations.

Machined from solid billet aluminum and finished in black anodize, this water neck provides durability and resistance to corrosion. The 20AN port designation accommodates -20 AN hose fittings, which are commonly used in high-performance applications. The compact 5.35 x 3.45 x 6.85-inch profile allows strategic placement in tight engine compartments without sacrificing flow capacity.

Mechanics and fabricators building small-block Chevrolet, Ford, and Mopar engines benefit most from this versatile fitting, as it eliminates fitment conflicts with modern serpentine belt systems and aftermarket intake manifolds. Whether you're building a street rod or a race engine, this component provides the flexibility needed for effective cooling system design.