The Heavy Hauler 5.9 Cummins Common Rail Long Block is built for towing, heavy-duty work, and high-performance applications, delivering up to 700 HP while improving airflow, fuel efficiency, and durability. This long block includes a D&J Stage 1 High-Performance Cylinder Head, a street/towing camshaft for lower EGTs, and custom ARP 9/16 head studs for maximum sealing strength. Fully blueprinted, CNC-machined, and pre-lubed with break-in oil, this long block is engineered for superior reliability and performance. Manufactured by D&J Precision Machine, this engine is designed to handle extreme workloads with ease.
Read More