JOHN DEERE TURBO (NEW) Fits following tractor models-4250 4440 4450 4640 4650 4840 4850 8430 8440 8450 4050 4240 Fits following combines- 6620 7700 7720 8820 Manufacturer- AiResearch Replaces john deere #s- AR87421 & RE19784 #4097101N