O-Ring Boss to Radiator Hose -16-ORB to 1.500

The O-Ring Boss to Radiator Hose -16-ORB to 1.500 adapter from Drag Race Solutions is a precision fluid-transfer fitting designed for high-performance cooling system modifications. This adapter bridges the gap between -16 ORB (O-Ring Boss) port standards and 1.500-inch radiator hose connections, making it essential for custom cooling loops, engine transplants, and motorsport builds where OEM cooling geometry doesn't match your upgraded powerplant. Whether you're integrating a remote oil cooler, upgrading radiator plumbing on a race car, or fabricating a custom water jacket circuit, this fitting eliminates adapter stacks and simplifies your line routing.

Constructed to Drag Race Solutions' exacting standards, the O-Ring Boss to Radiator Hose adapter features a robust -16 ORB threaded port on one end and a smooth 1.500-inch barbed or slip-fit hose connection on the other. The ORB design employs a tapered seal geometry with an integral O-ring groove, ensuring zero-leak performance under high coolant pressure and temperature cycling—critical in competition environments where hose separation means catastrophic overheating. The compact 2.5 x 2.5 x 4-inch footprint and lightweight 0.247-pound construction allow tight integration into engine bays where space is at a premium, while the direct ORB-to-hose transition eliminates unnecessary hardware that adds weight and complexity.

This adapter is ideal for drag racers, road course competitors, and street performance builders running custom cooling systems. It works seamlessly with aftermarket radiators, remote-mounted coolers, and fuel-injection cooler lines that require reliable, compact ORB-to-hose transitions. Installation is straightforward: thread the ORB port into any -16 ORB casting or block port, then secure your 1.500-inch diameter hose with quality worm-gear clamps or hose barb fittings. Check hose wall thickness and pressure ratings to match your system's PSI requirements, typically 15–20 PSI for street cooling and up to 30+ PSI for forced-induction applications.