Bosch DLLA140P517 Diesel Injector Nozzle

The DLLA140P517 is a Bosch P-type multi-hole injector nozzle designed for direct injection diesel engines. It features a long-stem body with a 140-degree spray angle optimized for the combustion chamber geometry of the Cummins 6CT/6CTA 8.3L engine series. The nozzle body is manufactured from high-speed alloy steel to withstand high-pressure fuel erosion and thermal cycling. This component serves as the critical metering and atomization element within the fuel injector assembly (Bosch KBAL105P29 / 0 432 191 629). It operates at a factory-set opening pressure of approximately 300 bar (4,350 psi). The needle valve and nozzle body are lapped as a matched pair (assembly) to ensure zero leakage at seat and precise fuel delivery. Cross-reference interchangeability includes Bosch part number 0 433 171 371 and Cummins OEM part number 3928384. It is applicable across heavy-duty trucks, construction machinery, agricultural equipment, marine propulsion, and stationary generator sets powered by the Cummins 6CT 8.3L platform. Quality certifications include ISO/TS 16949 and ISO 9001.