4AN Anodized Hose Finisher Black

The 4AN Anodized Hose Finisher Black by REDHORSE PERFORMANCE is a precision-engineered component designed for high-performance fuel, coolant, and hydraulic line applications. This fitting serves as the polished termination point for custom automotive plumbing systems, particularly in turbocharged, supercharged, and fuel-injected engine builds. A quality hose finisher ensures leak-free connections and a clean, finished appearance in your engine bay.

Manufactured to AN (Army-Navy) specifications, the 4AN designation indicates a hose outer diameter compatible with 1/4-inch tubing, delivering reliable flow rates across both low and high-pressure applications. The anodized black finish provides superior corrosion resistance and a professional appearance that resists oxidation and brake fluid degradation—critical for longevity in modern engine compartments exposed to heat cycling and moisture. REDHORSE's precision machining ensures concentricity and smooth bore surfaces that eliminate turbulence and pressure loss.

Mechanics and fabricators working on fuel system upgrades, coolant reroutes, or custom brake line builds will appreciate the hose finisher's reliability and performance. Its design allows for installation in tight underhood spaces without compromising accessibility or future serviceability. This product is ideal for anyone looking to enhance their automotive plumbing with a high-quality, durable fitting.