2003-2007 Cummins 5.9L Stage 1 Performance Cylinder Head w/ Fire Ring & Head Gasket (DJPCH100202)

The 2003-2007 5.9 Stage 1 Cummins Performance Cylinder Head is designed to deliver increased airflow and durability without the added cost and complexity of an aftermarket intake. Featuring 105-pound valve springs and a 5-axis CNC port job, this head significantly boosts intake flow from 155 CFM to 220 CFM, improving low-end performance, reducing boost pressure, and lowering EGTs. Built on the foundation of the HP Reman Head, it includes new bronze guides, oversized hardened seats, and a high-performance CNC valve job for enhanced longevity and efficiency. Manufactured by D&J Precision Machine, this cylinder head is a proven upgrade for both stock and performance-driven Cummins builds. This SKU includes a custom-matched Fire Ring gasket for high-boost head-to-block sealing.

Part Number: DJPCH100202

• 5-Axis CNC Ported for Increased Flow: Intake flow increased from 155 CFM to 220 CFM for improved efficiency and power
• 105-Pound Valve Springs: Enhances valve control to support higher boost and RPM
• Factory Intake Plenum Retained: Simplifies installation while maximizing airflow gains
• Upgraded Hardened Valve Seats: Extra-large, heat-resistant seats prevent failure and extend durability
• Precision CNC Valve Job: Optimized for enhanced airflow and performance
• Thoroughly Remanufactured & Pressure Tested: Crack-checked, resurfaced, and assembled to exceed OEM standards
• Direct Bolt-On Replacement: Designed for 2003-2007 Dodge Cummins 5.9L engines
• Fully Assembled for Convenience: Includes new valve seals, soft plugs, and HD springs, ready for installation
• Includes a custom-matched Fire Ring gasket for maximum head-to-block sealing under high boost

• Warranty: 12 months parts and 12 months labor
• Manufactured By: D&J Precision Machine

A refundable core charge applies to this product. The core deposit will be refunded once a complete, rebuildable core is returned within 30 days of receipt. Cores must be complete and serviceable per D&J Precision Machine requirements.

• Freight charges apply; this item ships LTL.
• Made-to-order; lead times vary. Contact us for current ETA.
• Not for sale on California-licensed vehicles per BD Diesel / D&J Precision Machine policy.