1-15416845-2 PIPE; INJ NO.4 for ISUZU ZX450-3/6WG1T

Engineered to Isuzu Injection System Specifications

The No. 4 injection pipe is a precision-engineered high-pressure conduit responsible for delivering precisely metered diesel fuel from the injection pump (or common rail) to the No. 4 cylinder injector. Isuzu Genuine Injection Pipes are manufactured to exact OEM bore diameter, length, and bend geometry—ensuring that the fuel pressure wave reaches injector No. 4 with the precise timing and amplitude required for optimal combustion. This accuracy guarantees a clean spray pattern, complete fuel atomization, and balanced power output across all cylinders. Aftermarket pipes frequently deviate in internal diameter or overall length, disrupting injection timing and leading to rough idle, misfires, and reduced engine efficiency.

Built for Durability Under High Injection Pressures

No. 4 injection pipes operate under severe conditions, withstanding sustained fuel pressures and continuous vibration from the engine block. Isuzu Genuine Injection Pipes are manufactured from high-grade, heat-resistant steel alloys, selected for their ability to resist expansion, cracking, and fatigue under extreme stress. A hard-wearing, corrosion-resistant coating protects the external surface from road salt, moisture, and chemical contaminants, preserving structural integrity over hundreds of thousands of kilometers. Precision-formed flare (cone) fittings at each end create a metal-to-metal seal that maintains leak-free performance through endless thermal cycles from cold start to full operating temperature.