High-pressure fuel injection pump engineered for precision performance in 4L40DB and 4L88-R17 engines, compatible with BH4QT80R8 and BH4QT90R9 models. Constructed with hardened steel alloy components for extreme durability under high-pressure conditions. CNC-machined to micrometer tolerances ensuring optimal fuel delivery and combustion efficiency. Ideal for industrial machinery, heavy-duty generators, and commercial vehicle fleets requiring reliable fuel system components. Features advanced anti-corrosion coating for extended service life in harsh operating environments. Direct OEM replacement part with identical specifications to original equipment.