SKU: ALL46402-21
UPC: 848238049015
MPN: ALL46402-21
The ALLSTAR PERFORMANCE 21-inch #4 Line brake hose assembly is a braided stainless steel, PTFE-lined hydraulic line engineered for high-pressure brake system applications in performance vehicles. This 21-inch hose features a 4 AN straight female fitting on one end and a 4 AN 90-degree female fitting on the other, making it ideal for routing around engine bay obstructions and tight frame configurations where direct hose runs are impractical. The dual-female configuration allows seamless integration into custom brake line layouts common in drag racing, off-road vehicles, and heavily modified street performance builds.
Braided stainless construction delivers superior pressure retention and vibration resistance compared to rubber-only lines, a critical advantage in high-load braking scenarios where fluid degradation and hose failure can create catastrophic safety issues. The PTFE inner lining resists corrosion from brake fluid exposure and maintains structural integrity across repeated thermal cycles. At 4 AN sizing, this hose accommodates the volumetric demands of modern performance brake systems while maintaining optimal pressure distribution. The 21-inch length and 90-degree elbow configuration offer flexibility for engine swaps, relocated master cylinder installations, and non-OEM brake component positioning—common requirements in fabrication shops and serious track-focused vehicles.
This hose assembly targets fabricators, performance brake shops, drag racing programs, and off-road builders who require precise brake line routing without compromising system integrity. It solves the problem of fitting modern brake hardware into vintage platforms, custom frame layouts, and turbocharged engine bays where stock brake line paths no longer work. Serious buyers performing brake system upgrades—whether converting to larger calipers, dual master cylinder setups, or proportioning valve configurations—depend on AN-rated hose assemblies to meet SAE J518 pressure standards and avoid mid-event brake failure.
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