#4 > #3 Reducer

The EARLS #4 to #3 Reducer is a straight-port adapter fitting designed to connect 4 AN female O-ring ports to 3 AN male ports in fluid systems requiring intermediate step-down capability. This aluminum adapter is manufactured to OEM specifications and anodized in blue to resist corrosion while providing visual identification in high-temperature and high-pressure hydraulic, fuel, and coolant applications.

The straight-port design eliminates flow directional changes that can introduce turbulence and pressure drop. The 4 AN female O-ring inlet accommodates standard -4 hose assemblies, while the 3 AN male outlet threads directly into -3 component ports without additional adapters. Blue anodizing provides corrosion resistance and helps distinguish this reducer in system schematics and field troubleshooting. At 0.03 lbs and compact dimensions, the fitting adds negligible weight and space burden to fuel systems, cooling circuits, and brake applications.

This adapter serves technicians upgrading hose routing on performance vehicles, cooling system modifications, fuel system reconfiguration, and hydraulic installations where port size standardization is needed. EARLS fittings are engineered for motorsports, racing, and high-flow applications where seal integrity and flow consistency are non-negotiable. The O-ring port face ensures a positive seal under dynamic pressure cycling, making this reducer suitable for both fuel injection systems and brake circuit applications requiring reliable, leak-free connections across different port sizes.