BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head with Fire Ring | 2003-2007 RAM 2500/3500 5.9L Cummins

Features:

• 5-axis CNC porting for increased airflow
• Boosts intake flow from 155 CFM to 220 CFM
• 105-pound valve springs prevent valve float
• Supports higher boost and RPM levels
• Upgraded hardened valve seats for durability
• Bronze valve guides for extended lifespan
• Factory intake plenum retained for easy install
• Direct bolt-on replacement for quick setup
• Reduces boost pressure and lowers EGTs
• Optimized CNC valve job for better efficiency
• Built for 2003-2007 Ram 5.9L Cummins
• Includes fire ring for added sealing strength

Keep Your High-Horsepower 5.9L Cummins Under Control

If you’re running high boost or making serious power with your 5.9L Cummins, a stock or even remanufactured cylinder head might not hold up. Factory heads can struggle with airflow, valve control, and sealing under extreme pressure, especially when pushing past stock horsepower levels. That’s why the BD Diesel Stage 1 Performance Cylinder Head with a fire ring is an ideal upgrade. It’s built to handle the added stress of tuned and hard-working diesel engines while delivering better performance, improved reliability, and enhanced durability. One of the biggest upgrades this head offers is its 5-axis CNC porting, which significantly improves intake airflow. Stock heads flow around 155 CFM, but this one is reworked to move up to 220 CFM. That means more air reaching the cylinders, resulting in better throttle response, quicker turbo spool, and lower exhaust gas temperatures. More efficient airflow also reduces boost pressure at the same power level, which helps extend the life of your turbo and other supporting components.

Stronger Valve Springs with Impressive Durability

Stronger valve springs are another crucial improvement. This head comes equipped with 105-pound valve springs designed to prevent valve float under higher RPMs and boost levels. If you’re running an aggressive tune, towing heavy loads, or putting your truck through its paces, these springs ensure your valvetrain stays under control, maintaining power and efficiency without risk of failure. Durability is a key focus in this design, and that’s where the hardened valve seats and bronze guides come in. Stock valve seats have been known to loosen or fail over time, especially in high-performance applications. BD Diesel solves this problem with upgraded seats that resist extreme heat and pressure. The added strength means you don’t have to worry about costly engine damage down the road.

Includes Fire Ring

What really sets this head apart from other performance options is the integrated fire ring system. Fire rings create a tighter seal between the cylinder head and block, preventing combustion gases from escaping. This is especially important for trucks running high boost or heavy fueling, as it helps keep everything sealed even under extreme conditions. If you’re pushing your Cummins past stock power levels, a fire ring setup is one of the best ways to ensure reliability and prevent head gasket failures. Despite these upgrades, installation is straightforward. This head retains the factory intake plenum, meaning you don’t have to make extra modifications to fit it onto your truck. It’s a direct bolt-on replacement for any 2003-2007 5.9L Cummins, making it an easy choice whether you’re upgrading for performance or replacing a worn-out stock head.

Fits: 2003, 2004, 2005, 2006, 2007 Dodge / Ram 5.9L Cummins

Core Charge: Refundable Core Charge of $800 applies.

Note: Not for sale on licensed California vehicles