4AN 402 Series Push Lock Hose 20ft Black

The 4AN 402 Series Push Lock Hose 20ft Black from REDHORSE PERFORMANCE is the professional-grade fuel and fluid line solution every serious vehicle modifier needs in their arsenal. Whether you're building a custom fuel system for a high-performance engine swap, upgrading your vehicle's brake lines, or designing a complete custom cooling circuit, this 20-foot hose delivers the reliability and flow characteristics required for demanding automotive applications. Push-lock hose represents a significant step forward from dated crimped fittings, offering faster installation, superior leak resistance, and the repeatability that separates amateur builds from shop-quality work.

The 4AN sizing indicates a quarter-inch nominal bore diameter—ideal for fuel delivery, coolant circulation, and moderate-flow hydraulic applications where space is at a premium but performance cannot be compromised. REDHORSE's 402 Series construction features reinforced synthetic rubber with braided nylon layers that withstand the pressure spikes and thermal cycling inherent in modern forced-induction and naturally aspirated engine bays. The push-lock fitting design eliminates the need for specialized crimping tools; simply push the hose firmly onto the barbed fitting until it seats completely, creating a positive mechanical lock that resists vibration loosening and maintains integrity across a wide temperature range. The black exterior resists UV degradation and blends seamlessly into any engine compartment aesthetic while the 20-foot length provides the flexibility to route lines around obstacles, under floors, or through custom firewalls without unnecessary splices.

Professionals and dedicated enthusiasts rely on this hose for fuel system conversions, auxiliary cooler installations, catch-can plumbing, and any custom circulation application where OEM lines fall short. The 4AN diameter pairs perfectly with standard automotive quick-disconnects, AN-threaded adapters, and modular fuel distribution blocks used in LS swaps, rotary conversions, and supercharger/turbocharger setups. At 1.83 pounds for the 20-foot spool, the hose remains light enough for weight-conscious builds while maintaining the wall thickness and pressure rating necessary for safety-critical fuel and coolant circuits. Installation requires only hand-tightening of push-lock fittings—no torque wrench, no special training—making system modifications accessible while maintaining the durability standards expected in competition and street-driven vehicles alike.