Billet Water Filler Neck - Angled Black

The DRAG RACE SOLUTIONS Billet Water Filler Neck – Angled Black (part number 3300-001B) is a precision-engineered aluminum component designed for custom cooling system applications in performance and racing vehicles. This angled water neck features a 45-degree design with a 12 AN female O-ring connection, delivering OEM-quality fitment and reliable fluid transfer in high-performance engine builds where stock filler necks are inadequate or incompatible.

Machined from billet aluminum and finished in black paint, this water filler neck integrates seamlessly into custom cooling loops and modified cooling systems common in drag racing, street performance, and engine swaps. The 12 AN female O-ring connection standard ensures compatibility with AN-threaded hose adapters and radiator hose fittings widely used in high-flow cooling applications. The angled geometry accommodates unconventional engine bay layouts where traditional vertical or straight filler necks create clearance conflicts with intake manifolds, turbocharger components, or custom headers.

Buyers installing this filler neck typically operate vehicles undergoing significant engine modifications, custom cooling system upgrades, or engine displacement changes that require flexible plumbing solutions. The billet construction resists corrosion better than cast iron in aggressive cooling fluids and salt exposure, while the O-ring sealing surface eliminates the need for thread sealant tape—a critical advantage in racing applications where coolant leaks compromise performance and engine reliability. Each unit ships complete with integrated O-ring hardware, ready for installation into AN-plumbed cooling systems.