15in #4 Line -4 Str/-4 90 Deg

The ALLSTAR PERFORMANCE 15-inch #4 Line brake hose with -4 straight and -4 90-degree fittings is a precision-engineered hydraulic line designed for high-performance brake systems in motorsports, marine, and high-demand industrial applications. This 15-inch brake hose assembly features braided stainless steel construction with PTFE internal lining, providing superior corrosion resistance and consistent pressure delivery across demanding operating conditions.

The 4 AN hose specification indicates a nominal inner diameter sized for 4 AN (1/4-inch) fluid flow, meeting industry standardization for brake line sizing. The configuration pairs a 4 AN straight female fitting with a 4 AN 90-degree female fitting, enabling flexible routing around engine bays, frame rails, and tight geometric constraints. PTFE inner lining minimizes swelling and maintains dimensional stability under thermal cycling, while the braided stainless exterior resists abrasion, salt-air corrosion, and UV degradation. The 15-inch length accommodates medium-run brake line paths without requiring intermediate couplings or extension fittings.

This hose assembly serves drag racers, road racers, marine propulsion systems, and off-road performance builds where OEM brake lines lack routing flexibility or fail to withstand extreme heat cycles and corrosive environments. Off-road recovery operations and high-performance street vehicles benefit from the durability and precise fitting geometry. Technicians and builders selecting replacement or upgrade brake lines for custom hydraulic builds rely on the 4 AN sizing for compatibility with industry-standard fittings, adapters, and manifolds.

The combination of braided construction and PTFE lining represents the modern standard for performance brake systems, balancing pressure capability, thermal stability, and installation simplicity. The straight-to-90-degree configuration eliminates the need for separate elbows, reducing connection points and potential leak sources in systems where reliability is non-negotiable.