Repl Reducer Fitting -8 to -4

The Repl Reducer Fitting -8 to -4 from Allstar Performance is a straight adapter designed to connect larger 8 AN (AN8) female ports to smaller 4 AN (AN4) male connections. This fitting solves a common challenge in high-performance fuel, oil, and coolant systems where line sizes must transition between different circuit sections. Whether you're building a custom engine bay layout, upgrading a fuel delivery system, or adapting legacy components to modern plumbing standards, this reducer fitting provides a reliable, leak-free solution for motorsports and industrial hydraulic applications.

Constructed from durable steel with a zinc oxide finish, the Repl Reducer Fitting -8 to -4 resists corrosion and maintains structural integrity under pressure and temperature cycling. The straight-through design minimizes flow restrictions and turbulence, preserving system efficiency when stepping down from 8 AN to 4 AN bore sizes. Zinc oxide coating provides corrosion protection in both wet engine bays and sealed hydraulic environments, ensuring longevity even under aggressive operating conditions. The compact 3.5 x 0.9 x 4.55 inch form factor allows installation in tight spaces without requiring additional adapter stacks.

Performance enthusiasts, engine builders, and technicians choose this reducer fitting when consolidating multiple smaller lines into a single larger manifold port or vice versa. It integrates seamlessly into fuel systems, oil cooler circuits, and coolant bypass loops where AN line compatibility matters. Installation is straightforward—simply thread the 8 AN female end onto your source port and connect your 4 AN male line to the outlet. Weighing just 0.13 lbs, it adds negligible weight while eliminating leaks and maintaining proper system pressure ratings across your entire circuit.