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The c-aterpillar 387-9439 fuel injector is a premium OEM-compatible component purpose-engineered for c-aterpillar C9 series diesel engines, with cross-reference part numbers 3879439, CA3879439, and 20R-8061. As a core part of the C9 engine’s fuel delivery system, it adopts the advanced HEUI (Hydraulically Actuated Electronically Controlled Unit Injection) technology, which enables precise hydraulic drive and electronic control to achieve accurate fuel metering and timing adjustment, perfectly matching the C9 engine’s 8.8L displacement and 250-450HP output. Manufactured to strict c-aterpillar OEM standards and ISO 9001 certific-ation, this injector ensures seamless plug-and-play installation as a direct replacement, requiring no modific-ations to the engine or fuel system. As a new aftermarket part produced by professional diesel fuel injection component manufacturers, it is built to withstand harsh operating conditions in construction sites, mining operations, and industrial generator sets. Equipped with precision-machined 7-hole nozzles for superior fuel atomization, a high-strength heat-treated alloy steel body, and wear-resistant anti-corrosion coating, it delivers stable 24V operation, consistent injection performance, and optimized combustion efficiency to reduce fuel consumption and harmful emissions. Each unit undergoes 100% factory bench testing, including electrical performance, pressure resistance (adapting to the C9 engine’s high injection pressure), spray pattern, and sealing detection, guaranteeing long-term reliability under heavy-duty conditions. With in-stock availability, flexible MOQ (1 piece for small orders, batch discounts available), 12-month quality warranty, fast global delivery (3-7 working days), and neutral export packaging, the 387-9439 injector is ideal for C9-powered excavators, motor graders, and industrial equipment, meeting the needs of global aftermarket and export customers.

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