Fitting12an Male to 16an Male w/External Screen

The Fitting 12 AN Male to 16 AN Male with External Screen from MOROSO is an essential adapter for high-flow fuel, oil, and coolant systems in performance and racing vehicles. This fitting bridges incompatible hose sizes in custom fuel injection setups, turbocharger plumbing, and wet-sump lubrication circuits where precise flow control and filtration are critical. Mechanics and engine builders rely on AN fittings for their reliability under extreme pressure and temperature conditions where standard automotive connectors fail.

The integrated external screen design filters particulate matter directly at the fitting port, protecting downstream fuel injectors, oil galleries, and radiator cores from debris-induced blockages and component damage. The male-to-male configuration allows seamless installation between AN hose adapters without requiring additional bulkhead or panel modifications. MOROSO's precision engineering ensures consistent AN thread sizing (JIC 37° flare standard) and pressure-rated sealing surfaces that maintain integrity under sustained boost, high-RPM operation, and thermal cycling—critical factors in supercharged, turbocharged, and naturally aspirated racing engines.

This fitting is ideal for builders transitioning from smaller-diameter AN12 supply lines to larger AN16 distribution tubes, typical in fuel-cell installations, fuel rail upgrades, and secondary cooling loops. Installation requires standard AN wrenches and compatible hose barbs or threaded adapters; the compact 5.437 × 1.625 × 7.187 inch profile fits tight engine bays and transmission tunnel configurations. Verify AN thread compatibility on both supply and return sides before purchase to ensure leak-free operation across all circuit pressures.