4AN Bulk Brake Hose Black

The 4AN Bulk Brake Hose Black from REDHORSE PERFORMANCE is a precision hydraulic brake line engineered for vehicles requiring reliable fluid transfer under extreme pressure conditions. Whether you're upgrading a daily driver, building a track-focused machine, or restoring a classic with modern braking performance, this hose delivers the consistent pressure integrity that separates adequate braking from predictable, fade-resistant stopping power. Purpose-built for automotive enthusiasts who refuse to compromise on brake system reliability, the 4AN sizing accommodates both OEM replacements and custom brake system configurations.

Constructed with a black synthetic outer covering, this bulk brake hose utilizes AN (Army-Navy) 4 standard fitting geometry—a metric that ensures precise bore sizing and pressure-rated performance up to the demands of high-performance braking circuits. The hose construction withstands thermal cycling, vibration stress, and the corrosive effects of brake fluid over extended service intervals, critical factors when running vehicles at track speeds or in motorsport applications. The bulk format allows fabricators and professional mechanics to cut custom lengths, minimize waste on multi-vehicle projects, and achieve seamless integration with existing brake plumbing without pre-made length limitations.

This product suits DIY builders, professional shops, fleet maintenance operations, and motorsport fabricators who need OEM-quality brake hose material without premium pricing. Installation requires standard hose crimping tools and AN fitting end-pieces; ensure all connections are torqued to specification and pressure-tested before operating the vehicle. The 4AN diameter is compatible with most aftermarket brake bias proportioning valves, master cylinders, and caliper inlet ports found on modern performance platforms and period-correct restoration builds.