Fuel Injection Pump 4307021 Compatible with CUMMINS QSL8.9 ISL8.9 QSC8.3 ISC8.3 Engine. Part Type: Fuel Injection Pump. Item Condition: Aftermarket Part. Way of Use: Direct Replacement. Reference Number: 4307021, 4307021RX, 4307021NX, 3973228. If there is any problem during this period, repair or replacement service will be provided. B6.7 CM2350 B121B. QSL9 M CM2250 L106. ISL8.9 CM2150 L110. ISL8.9 CM2880 L112. ISL8.9 CM2880 L140. QSC8.3 CM850(CM2850).