Cummins 8.9 QSB Injector 3976372 0986435597New and reman injectors for Cummins QSB Engines. Note: A $100. 00 refundable core charge is due. We will email you a paypal invoice for the core charge that will be refunded upon receiving the old rebuildable core. Testing Service Available For This Injector $40. 00 Each Cross References: 0 445 120 059 0 445 120 231 0 986 435 597 0 986 435 597RX 0445120059 0445120231 0986435597 0986435597RX 3976372 3976372NX 3976372PX 3976372RX 4945969 4945969NX