4AN Push Lock Hose End Str Blue

The 4AN Push Lock Hose End Str Blue from REDHORSE PERFORMANCE is a purpose-built fluid line adapter designed for high-performance automotive fuel, oil, and coolant systems. This straight-configuration hose end is engineered for serious enthusiasts and professional mechanics working on modified vehicles, turbocharged engines, and custom cooling or fuel delivery setups. The push-lock design eliminates the need for traditional hose clamps, delivering a cleaner installation, faster assembly, and superior reliability under vibration and thermal cycling that aggressive driving demands.

Built to AN (Air and Automotive Numeral) standards, the 4AN designation indicates a nominal hose inner diameter of 1/4 inch, handling flow rates and pressure spikes common to fuel injection systems and forced-induction applications. The push-lock mechanism uses a precision-machined socket and internal lock ring that grips the hose with zero slippage once seated—no leakage risk from improper clamp torque or hose migration under boost or sustained load. The blue anodized finish not only identifies the line size at a glance during complex plumbing layouts, but also provides corrosion resistance in engine bays exposed to salt spray, coolant seepage, and thermal stress. Aluminum construction keeps weight minimal without sacrificing strength or durability.

Professional mechanics and engine builders favor REDHORSE PERFORMANCE push-lock hose ends for fuel system upgrades, auxiliary cooler installations, turbo feed and return lines, and custom intake manifold water jackets. The straight orientation suits in-line applications where minimal bend radius saves space and reduces vibration stress points. Compatibility spans any hose assembly rated for 4AN diameter; ensure your hose barb size matches the 4AN standard before ordering. Installation is straightforward—insert the hose fully into the socket until the lock ring engages, then verify the connection by gentle tugging. This fitting is essential for any serious modification where system reliability and cleanliness are non-negotiable.