21in #4 Line -4 Str/-4 90 Deg 5pk

The 21in #4 Line -4 Str/-4 90 Deg 5pk from ALLSTAR PERFORMANCE is a professional-grade brake hose assembly designed for high-pressure hydraulic systems in performance vehicles, racing platforms, and heavy-duty applications. Built for operators who demand reliability under extreme conditions, this five-pack delivers redundancy and flexibility for brake system routing in tight engine bays or custom installations. Whether you're a race mechanic, military vehicle technician, or performance shop owner, these hose assemblies eliminate the guesswork in brake line fabrication and reduce installation time on the job.

Each hose measures 21 inches in length with -4 AN fittings—a military-standard connection size rated for high-pressure fluid transfer—and features braided stainless steel construction wrapped around a PTFE (polytetrafluoroethylene) inner line. The assembly pairs a 4 AN straight female connector on one end with a 4 AN 90-degree female fitting on the opposite end, allowing directional flexibility for complex brake layouts without additional elbows or adapters. The stainless braiding resists abrasion, corrosion, and thermal stress, while the PTFE core maintains compatibility with DOT-approved brake fluids and resists swelling or degradation under sustained pressure. This combination is standard across military and aerospace applications where reliability is non-negotiable.

Technicians and builders benefit most from the five-pack configuration, which covers multiple brake circuits, provides spares for field replacement, and reduces inventory complexity on job sites. The 21-inch length accommodates most vehicle layouts from classic muscle cars to modern off-road platforms and light tactical vehicles. Installation is straightforward with standard -4 AN wrenches and no specialized tooling required. These hoses integrate seamlessly with any hydraulic system—brake, clutch, or suspension—that accepts -4 AN threaded connections. Verify your existing fitting thread pitch and system pressure rating before ordering to ensure compatibility with your specific application.