#4 > #3 Reducer

The EARLS #4 to #3 Reducer is a straight-port adapter fitting designed for high-performance fluid systems, primarily utilized in fuel lines and oil cooler setups. This reducer facilitates a seamless transition between larger #4 AN (5/16-inch) ports and smaller #3 AN (1/4-inch) ports, making it an essential component for routing fluid lines in tight engine bays or adapting aftermarket components.

Constructed from precision-machined aluminum or stainless steel, this adapter features straight-port internal geometry that minimizes flow restriction and pressure drop. Its design ensures a consistent bore diameter without internal shoulders or steps that could trap debris, which is critical for maintaining system cleanliness and protecting injectors or carburetors from contamination.

Engine builders and mechanics rely on EARLS reducers for fuel system upgrades and EFI conversions. This adapter simplifies assembly and disassembly, allowing modifications without introducing dead spots that could trap air or stale fluid, making it a valuable addition to any performance-oriented vehicle setup.