2003+ CR Stage 2 Cummins 5.9 Performance Head

Stage 2 5.9 CR Cummins Performance Head

Our Stage 2 5.9 CR Cummins Performance Head is designed for the performance enthusiast. It includes everything in our Stage 1 Cummins Performance Head plus a D&J Stage 2 5.9 CR Billet Intake Manifold, thread-in soft plugs in the head, titanium valve spring retainers, and heavy-duty extra-large valve seats.

Key Features:

• Upgraded Valve Seats: Our heavy-duty extra-large valve seats address the issue of stock seats falling out, ensuring durability and reliability.
• Thread-In Soft Plugs: Prevents soft plugs under the valve cover from coming out and filling the crankcase with coolant.
• Billet Intake Manifold: Designed to keep the factory MAP sensor, air horn, and throttle position sensor. This manifold ensures more even air distribution, preventing hotspots and potential piston melting.
• Increased Airflow: Intake flow increased to 250 CFM, compared to the stock 165 CFM, providing enhanced performance.
• Comprehensive Upgrades: Includes all features of our Stage 1 Cummins Performance Head.

Detailed Process:

• Replacement Style Billet Intake: Stage 2 includes a replacement style billet intake manifold.
• Complete Disassembly: The head is completely disassembled, and all soft plugs are removed.
• Cleaning and Blasting: Thorough cleaning and blasting to ensure a pristine surface.
• Crack Check: Performed to ensure structural integrity.
• New Components: Installation of all-new bronze guides and heavy-duty extra-large intake seats.
• 5-Axis CNC Porting: Performed for optimal airflow.
• Thread-In Soft Plugs: Installed under the valve cover for enhanced reliability.
• High-Performance Valve Job: Precision CNC valve job performed for enhanced performance.
• Resurfacing: The head is resurfaced to meet exact specifications.
• Thorough Cleaning: Comprehensive cleaning process to eliminate all debris.
• Expert Assembly: Assembled with all new valve seals, thread-in soft plugs, 115# springs, and titanium retainers.

Important Note:

*Cores must be in good condition with no cracks and must be rebuildable. D&J Precision Machine will inspect your core upon arrival to determine its suitability for rebuilding.

Upgrade your truck's performance and reliability with our Stage 2 5.9 CR Cummins Performance Head.