Main part 5271843 engine connecting rod has alternative number 5289332 for Cummins B3.3, G8.3, 6C8.3, ISC, QSC, QSB3.3, QSB6.7, ISL and QSL9 L8.9 engines. Forged high-strength alloy bears tremendous alternating explosive loads inside cylinders. Strict dimensional control guarantees good fit with crankshaft and piston assemblies, critical for engine power output and service lifespan.