42in #4 Line -4 Str/-4 90 Deg Tube Style

The 42in #4 Line -4 Str/-4 90 Deg Tube Style brake hose from ALLSTAR PERFORMANCE is purpose-built for high-performance automotive brake systems where precision routing and reliable hydraulic transfer are non-negotiable. This hose assembly serves enthusiasts and professional mechanics who demand OEM-quality or superior hydraulic performance in custom brake line configurations, custom chassis builds, and engine bay layouts where standard hard-line routing is impractical or impossible. Whether you're fabricating a hot rod, restoring a classic, or optimizing a race-car brake circuit, this braided hose delivers the durability and flow characteristics required for responsive pedal feel and fade-free braking under sustained thermal stress.

Constructed with a PTFE (polytetrafluoroethylene) lined core and braided stainless steel jacket, this 42-inch brake hose is engineered to withstand high pressure spikes and resist fluid degradation from elevated engine-bay temperatures. The 4 AN (AN4) hose diameter and fittings provide robust volumetric capacity suitable for master cylinders and caliper assemblies in small to mid-size brake systems. One end terminates in a 4 AN straight female connector, while the opposite end features a 4 AN 90-degree female fitting—this angular configuration eliminates the need for additional 90-degree adapters and reduces overall assembly complexity and leak points. The stainless steel braiding protects against abrasion from sharp chassis edges, engine components, and thermal cycling, while the PTFE lining resists swelling from modern DOT 3, DOT 4, and synthetic brake fluids.

This hose is ideal for custom and competition applications where factory brake lines cannot accommodate engine placement, suspension geometry, or aftermarket component layouts. Mechanics and fabricators working on tube-frame racecars, street rods, swapped powerplants, and widebody street cars benefit from the 42-inch length and directional end fittings, which allow flexible routing around headers, turbo manifolds, and tight engine-bay spaces. Installation requires standard AN wrench sizes and thread-sealant protocol; ensure proper support clips are used to prevent chafing and maintain compliance with DOT and sanctioning-body standards. Verify compatibility with your master cylinder and caliper port sizes (AN4 = -4 sizing) and confirm hose length accommodates full suspension travel without binding or overstretching during compression and extension cycles.