Are you looking to get your 5.9L Cummins running like new again? The Precision Plus Short Block from D&J is built for people who want more than just getting their truck back on the road; it’s about restoring confidence in the bottom end with tighter tolerances, better consistency, and a stronger overall foundation than a typical remanufactured engine. Instead of dealing with questionable machine work or worn-out cores, you’re starting fresh with a professionally built assembly designed to hold compression, maintain oil control, and stay reliable under real workload.

This is the sweet spot between stock rebuild and performance build. It’s designed for daily driving and towing, but with the added precision and consistency that helps support long-term durability and future upgrades. On top of that, it comes with the oil pan, oil cooler housing, and timing cover pre-installed, helping streamline installation and save time when it’s dropped into the truck. Whether your original engine failed or you’re planning before it does, this short block gives you a solid, dependable base that eliminates the guesswork and weak links that usually come with high-mileage 5.9s.

Each Precision Plus short block is fully remanufactured and CNC blueprinted, with machining processes including boring, honing, and surfacing to restore all critical tolerances to or tighter than OEM specifications. Every component is carefully inspected for cracks, wear, and dimensional accuracy, with key measurements such as bearing clearances, piston-to-wall clearance, piston protrusion, and ring gaps verified and corrected to ensure proper balance and performance.

Assembly is completed in a clean-room environment by skilled technicians using new internal components, ensuring consistent build quality and long-term durability. The result is a short block that delivers improved precision, better oil control, and more reliable operation under load.