The PRV-E-2200-1S is a single-stage, external return pressure relief valve engineered for LB7 and 5.9 style fuel systems operating at 2200 bar. Featuring an M18x1.5 thread, this valve delivers precise fuel rail pressure regulation and shields your high-pressure common rail system from damaging overpressure conditions. Sitting between stock and full performance pressure ratings, the PRV-E-2200-1S is the ideal solution for mildly to moderately built Duramax LB7 and Cummins 5.9 platforms running upgraded injectors or light tune modifications.