CJM Fuel Return System S1SE Nissan 370Z, Infiniti G37, Infiniti Q50/Q60CJM S1S. E fuel return system for 370Z, G37, and 3. 7 Q50. The well renowned CJM fuel return system is available at AdminTuning with short or no lead times, used in all of our VQ builds making 850WHP+. This system is critical for any turbo or supercharged car, or car running VP M5 race fuel. It includes the fuel pressure gauge and 10mm microglass filter optimized for larger fuel pumps such as the Walbro 450, 485, and 525 pumps, a 6 foot fire sleeve,