Inlet Fitting -20AN

The Inlet Fitting -20AN is a precision adapter engineered for high-performance fuel, oil, and coolant delivery systems in modified and racing vehicles. This straight-port -20AN male to 1-5/8-12 inch male O-ring fitting serves as a critical junction point in custom plumbing configurations, allowing mechanics and enthusiasts to reliably connect aftermarket radiators, heat exchangers, and fluid transfer lines with predictable, leak-free sealing. Whether you're building a turbo system, installing auxiliary cooling, or routing fuel to a carbureted engine conversion, this adapter provides the mechanical interface needed for professional-grade custom work.

Manufactured from aluminum and finished in clear anodize, the Inlet Fitting -20AN delivers both durability and corrosion resistance in underhood environments. The O-ring port design ensures a metal-to-elastomer seal that withstands pressure cycling and thermal expansion without galling or seizing, a critical advantage over older JIC or NPT adapters prone to leaks under boost or sustained heat. The straight configuration minimizes turbulence and pressure loss in fluid circuits, making it ideal for applications where flow efficiency directly impacts cooling performance or fuel delivery consistency. Its compact 4.05 x 1.8 x 7.05 inch footprint allows integration into tight engine bay layouts without requiring bulky manifold spacers or secondary adapters.

This fitting is essential for custom radiator installations, turbocharger intercooler systems, and any fluid circuit requiring reliable -20AN compatibility. Experienced builders trust O-ring face seal (ORFS) designs like this for drag racing, road course, and street performance builds where vibration and thermal cycling demand absolute leak prevention. Installation requires only standard SAE wrenches and proper torque sequencing to avoid O-ring compression issues; ensure mating surfaces are clean and use fresh seals if the fitting is being relocated. Compatible with aluminum and steel hose lines rated for -20AN, this adapter is a stock component for any serious modification shop's plumbing inventory.