D&J Heavy Hauler 2019+ Cummins Long BlockHeavy Hauler 6. 7 Cummins Long Block (2019+) Our Heavy Hauler 6. 7 Cummins Long Blocks for 2019+ models come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing, along with our Stage 1 High Performance Cylinder Head. We include a street towing camshaft, which typically results in a 200 300 degree drop in EGT and an increase in fuel economy due to the additional airflow. These engines are