Caterpillar original Fuel Injector for Gen Set and Excavator, 6I-4357 Diesel Engine Fuel Injector for Caterpillar C3500 3512 Cross Reference 0R-1759, Replacement for OEM 0R-3252 original new injector

Precision-built as a core component of Caterpillar’s 3500 Series heavy-duty diesel fuel delivery system, the original-type 6I-4357 fuel injector assembly supports consistent engine performance across high-pressure operating conditions. It delivers precise fuel metering and optimized atomization to boost engine efficiency, power output, fuel economy and emissions control while supporting long-term operational reliability. It fits 3508, 3512, 3512A, 3512B and 3516 engine models, with verified cross-reference part numbers for flexible sourcing and easy part matching.

This injector is widely deployed across mission-critical equipment in multiple sectors: it powers generator sets for data centers, offshore power facilities and continuous prime power stations, supports marine propulsion and auxiliary engines, and serves oil and gas, mining, construction and industrial power plant operations. It is recognized globally by Caterpillar distributors, injection specialists, equipment dealers and maintenance service providers.

The brand-new injector meets strict OEM performance and fitment standards, with a remanufactured version also available. It comes with a 12-month warranty, flexible packaging options and global shipping support. Precision injection reduces fuel costs, operational downtime and maintenance needs, while its rugged design suits harsh operating environments to deliver improved long-term return on investment.