Aftermarket direct replacement fuel injector for Cummins engine, built to restore fuel atomization and optimize engine working performance. Compatible Engine Models: Cummins Diesel Engine. Part Numbers: 0445120123, 4937065. Type: Common Rail Diesel Fuel Injector. Strictly tested for heavy-duty machinery working condition. Fits Cummins heavy-duty trucks and construction machinery. Matches OEM dimensions, drop-in installation without modification. Optimize fuel atomization, reduce fuel consumption and exhaust emission. Durable for heavy-duty transportation and engineering site environments. 1 × Common Rail Fuel Injector 0445120123 4937065.