original 20R-8056 Diesel Pump Injector 20R-8071 10R-4761 20R-8058 387-9429 328-2586 new injector original new injector

This HEUI fuel injector is engineered specifically for the C7 engine platform, covering the C7, C7.2, and C7 ACERT variants built around the 7.25 L inline 6-cylinder configuration with turbocharged, air-to-air aftercooled induction. It serves as a direct replacement under OE number 20R-8056 and matches additional references 10R-4762, 10R-7225, 20R-1260, 20R-8057, 20R-8058, 20R-8059, 387-9430, 387-9429, 387-9428, 295-1408, 295-1409, and 295-1410, allowing distributors and workshops to consolidate part numbers across the C7 injector family.

The injector operates within the HEUI hydraulic electronic unit injector system, using high-pressure engine oil for actuation while the ECM precisely controls injection timing and metering. This combination delivers stable atomization, accurate fuel delivery, and reliable electronic response that helps restore rated power across the 225–300 bhp (168–224 bkW) output range at 1800–2200 rpm. Correct oil pressure, clean diesel supply, and a healthy Injection Actuation Pressure system are required for full performance.

Fitment covers excavators, wheel loaders, track loaders, motor graders, vocational trucks, buses, coaches, industrial engines, generator sets, and selected marine or agricultural power units running the C7 platform. Each C7 engine requires six injectors, so technicians should confirm engine serial number, arrangement number, and the removed injector part number before installation.