#4 Brake Line Kit

The Longacre #4 Brake Line Kit is a universal hydraulic brake line assembly solution designed for custom automotive builds, high-performance vehicles, and motorsport applications where OEM routing doesn't accommodate the intended drivetrain or suspension geometry. This kit features braided stainless steel construction with assorted AN fittings and installation hardware, providing the flexibility needed to adapt brake systems to non-standard frame layouts or engine bay configurations.

The braided stainless steel hose resists corrosion and thermal degradation common in high-heat engine compartments or salt-air environments. The #4 AN size (.25-inch nominal ID) handles brake volumes typical of mid-sized brake systems and lighter competition vehicles. Assorted AN fittings included in the kit—JIC 37° flare connections—enable adaptation to master cylinders, proportioning valves, calipers, and lines from different manufacturers without requiring custom machine work. The natural zinc-plated steel hardware resists rust and meets standard automotive fastening tolerances.

This kit suits fabricators, restoration specialists, off-road builders, and motorsport technicians who need to route brake lines outside factory specifications. Whether adapting a modern brake system to a classic frame, integrating performance calipers into a custom vehicle, or retrofitting hydraulic lines around engine modifications, the universal fittings and braided construction handle pressure cycles and vibration without fatigue cracking. The 40.5-inch length provides sufficient material for most mid-sized applications, with fittings available for custom splicing if needed.