Extended 90 Degree Heater Fitting

The Extended 90 Degree Heater Fitting from Vintage Air is a precision adapter designed to route coolant or heating fluid in engine bay applications where space and angle restrictions demand a compact, angled solution. This fitting bridges the gap between modern heater hose systems and legacy or custom engine configurations, making it essential for hot rod builders, classic car restorers, and custom cooling system integrators who need reliable, leak-free connections in tight quarters.

Constructed from lightweight aluminum with a natural finish, the Extended 90 Degree Heater Fitting combines a 10 AN female O-ring port with a 5/8 inch hose barb outlet, allowing dual-connection compatibility in a single compact unit. The 90-degree angle geometry eliminates the need for multiple bent hoses and reduces overall system footprint, while the O-ring seal on the female port ensures vibration-resistant, pressure-rated connections that withstand engine heat cycles and operating pressures without weeping or separation. Aluminum construction keeps weight minimal while maintaining structural integrity in high-temperature environments typical of automotive cooling circuits.

Builders working with custom heater valve manifolds, auxiliary cooler setups, or non-stock engine layouts will find this fitting invaluable for adapting existing 10 AN hard-line plumbing to flexible 5/8-inch hose runs with minimal bending and routing complexity. Installation is straightforward: the O-ring female end accepts 10 AN male connectors (hand-tighten plus 1–1.5 turns with a wrench), while the hose barb accepts standard 5/8-inch heater hose secured with a hose clamp. Compact dimensions (5.5 x 1.35 x 7.65 inches) and lightweight design (0.2 lbs) make it easy to fit into congested engine compartments without adding vibration or stress to adjacent components.