The PRV-I-2400-2SDBV4 is a two-stage, internal return pressure relief valve engineered specifically for LLY, LBZ, and LMM style Duramax fuel systems operating at 2400 bar. Unlike single-stage designs, the two-stage configuration provides more precise pressure regulation across a wider RPM and load range, making it the ideal choice for modified Duramax platforms running upgraded injectors, performance tunes, or CP3 conversion kits. Rated at 2400 bar with an internal return design, this valve integrates cleanly into the factory fuel rail without external return line modifications, delivering reliable overpressure protection with a performance-focused design.