42in #4 Line -4 Str/-4 Str

The 42in #4 Line -4 Str/-4 Str brake hose is purpose-built for high-performance automotive brake system upgrades and custom modifications where reliability and precise fluid dynamics are non-negotiable. Fabricated from braided stainless steel with a PTFE (polytetrafluoroethylene) inner lining, this 42-inch hose assembly connects directly between two 4 AN (JIC -4) female straight fittings, making it ideal for custom brake line routing in race cars, performance street vehicles, and full brake system rebuilds. Whether you're upgrading from OEM rubber lines or constructing a custom brake hardline layout, this pre-assembled hose eliminates field fabrication errors and delivers consistent clamping geometry.

PTFE-lined construction resists thermal degradation and brake fluid chemical attack far more effectively than standard rubber, maintaining pressure integrity even under sustained high-temperature track conditions where traditional hoses swell and soften. The braided stainless steel outer jacket provides abrasion resistance, corrosion immunity, and flexible routing without the porosity issues that plague aged rubber hose. The 4 AN straight female-to-female configuration (both ends identical) provides maximum compatibility with standard -4 JIC fittings found on performance master cylinders, proportioning blocks, and caliper hardlines. At 0.3 lbs and measuring 42 inches in overall length, this hose offers the routing flexibility needed for custom engine bay layouts while maintaining a lightweight footprint critical for motorsports applications.

This brake hose assembly is essential for custom brake system builds, track-focused vehicles requiring superior thermal stability, and any application where OEM hose routing conflicts with aftermarket suspension, motor swaps, or frame modifications. Mechanics and fabricators rely on pre-assembled PTFE-lined hoses to eliminate the cost and risk of field-braiding fittings. The straight-to-straight configuration allows seamless integration into hardline systems or as the final bridge between fixed lines and moving suspension components that require flexible termination points.