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

The 90in #4 Line -4Str/-4Str from ALLSTAR PERFORMANCE is a professional-grade brake hose engineered for high-performance automotive applications where reliability and safety are non-negotiable. This 90-inch braided stainless steel brake line is designed for custom hydraulic brake system builds, street machines, racing applications, and any vehicle requiring remote caliper placement or extended line routing. Whether you're fabricating a custom chassis, relocating brake components during an engine bay rebuild, or upgrading to a full custom brake setup, this hose delivers the flow rate and durability modern performance builds demand.

Built with PTFE (polytetrafluoroethylene) internal lining and braided stainless steel construction, the 90in #4 Line resists corrosion, abrasion, and brake fluid degradation under sustained high temperatures and pressure cycling. The 4 AN (1/4-inch) bore diameter provides adequate flow capacity for dual-circuit brake systems while maintaining line flexibility for tight routing around engine components, frame rails, and suspension geometry. The straight female 4 AN connections on both ends allow tool-free hose assembly with standard AN fittings, simplifying installation and reducing leak points common in friction-fit designs. PTFE lining prevents fluid absorption and maintains consistent brake feel across repeated heat cycles—critical for track use or aggressive street driving where fade can compromise stopping power.

Mechanics and fabricators favor this hose for custom brake system layouts where stock rubber lines won't reach or withstand thermal cycling. The 90-inch length accommodates longer-than-stock runs from master cylinders to rear axle calipers, making it ideal for tube chassis builds, rear-engine conversions, or vehicles with significantly relocated caliper positions. Pair this line with compression or reusable AN fittings rated for your brake system's working pressure (typically 1200+ PSI for performance applications) and a quality synthetic brake fluid to achieve a fully custom, street-legal hydraulic braking system. Weight under 0.6 lbs makes it negligible for weight-conscious builders seeking every advantage in handling balance and acceleration.