6AN to 4AN Reducer Black Female Male

The 6AN to 4AN Reducer Black Female Male fitting from REDHORSE PERFORMANCE is an essential adapter for custom fuel systems, coolant lines, and hydraulic brake builds where line size transitions are necessary. This reducer fitting is designed for mechanics and fabricators who need to bridge incompatible hose sizes without compromising flow integrity.

Machined from aerospace-grade aluminum, the 6AN to 4AN reducer features a black anodized finish that resists corrosion and provides a clean, professional appearance. The female inlet (6AN port) accepts larger diameter hose or line connections, while the male outlet (4AN) threads directly into smaller fittings, ensuring a leak-free seal.

This reducer is indispensable for fuel system conversions, carbureted-to-EFI swaps, and custom radiator cooling loops. Its compact footprint makes it ideal for tight engine bays and performance applications where reliability is crucial.