Caterpillar original Engine Injector Assembly Spare Parts for C7 C9 C6.4, Fuel Injector Nozzle 266-4446, Cross Reference 254-4330 265-8106 267-9722, Replacement for OEM, original new injector

The Caterpillar 266-4446 Fuel Injector GP is an original new, high-precision diesel fuel injection component engineered specifically for CAT C9 engine platforms and associated heavy-duty industrial equipment. Manufactured to stringent OEM specifications, it delivers accurate fuel metering, optimized atomization, and stable combustion under extreme operating conditions, helping engines maintain consistent power output, improved fuel economy, and controlled emissions across extended service intervals.

Built from high-strength alloy steel with precision-ground valve assemblies and high-performance nozzle technology, the injector intensifies fuel pressure beyond 23,000 PSI (1,600 bar), depending on engine calibration, converting diesel into microscopic droplets for cleaner, more efficient combustion. Each unit is factory tested and calibrated to OEM standards for dependable performance. The 266-4446 interchanges with multiple Caterpillar reference numbers, including 236-0962, 235-2888, 217-2570, 188-8739, 387-9434, and 328-2573, plus remanufactured 10R-7224 and exchange 20R-8063 numbers, simplifying cross-referencing and global aftermarket sourcing.

This injector serves a broad range of Caterpillar applications, covering C9, C9 ACERT, C9 marine, and C9 power generation engines. Typical equipment fits include the 330C and 330C L excavators, 973C crawler loader, D6R, D6R II, and D6T track-type tractors, and 627G and 637G wheel tractor-scrapers, along with motor graders, forestry machines, and agricultural power units. The 266-4446 is widely recognized across construction, mining, marine, and power generation supply chains worldwide, making it a reliable choice for fleet maintenance and engine overhaul programs.