Caterpillar original 20R-8064 Common Rail Fuel Injector, for heavy duty diesel engine application, Replacement for OEM Parts, Cross Reference 557-7633, 387-9433 original new injector

The Caterpillar 20R-8064 is an original electronic high-pressure common rail diesel injector engineered for CAT C9, C9 ACERT and C9.3 engine platforms. Built to strict OEM manufacturing specifications and industrial durability standards, it operates at fuel pressures of 1,600–2,000 bar and works in tandem with the engine ECM to adjust injection quantity and timing in real time based on engine speed, load, temperature and boost pressure inputs. This precise control ensures consistent fuel delivery to the combustion chamber under even the most demanding operating conditions.

This industrial-grade injector delivers tangible operational benefits for heavy equipment operators, including improved fuel economy, reduced PM and NOx emissions, higher engine power output, enhanced cold-start performance, lower engine vibration and reduced long-term operating costs. Its hardened corrosion-resistant internal components, laser-calibrated multi-hole nozzle and micron-level tolerance control support extended service life, stable injection performance and a consistent spray pattern, minimizing unplanned equipment downtime.

A direct OEM replacement with verified cross-references to 320-8064, 10R-8056, 10R-8055 and 10R-8057, the 20R-8064 is compatible with CAT 320D/325D/330D/336D excavators, 950H/966H wheel loaders, motor graders and generator sets. It is suited for construction, mining, power generation, industrial and marine auxiliary power applications, delivering reliable, OEM-matched performance for global aftermarket customers.