Industrial Injection Stage 1 Ported and Polished Cylinder Head With Fire Rings 03-07 Ram 5.9L Cummins

Whether you are going for a peak build or just wanting some extra strength and reliability in your truck, you cannot miss with Industrial Injection's Stage 1 Ported and Polished Cylinder Head with Fire Rings. These are designed to help your Cummins engine handle the increased cylinder pressures that come with upgraded injectors, larger turbos, and higher-performance fuel systems. The integrated fire-ring design provides a stronger combustion seal than traditional setups, helping reduce the risk of head gasket failure under higher boost and fueling levels. NOTE: Installation of a fire ring gasket requires high yield head studs to ensure proper seat of the head to the cylinder block. Each cylinder head also undergoes a precision porting and polishing process that ensures consistent airflow through every intake and exhaust port. By balancing airflow across all cylinders, this design helps each cylinder produce more even power, resulting in smoother operation and making engine tuning more predictable. If you're building a Cummins for increased power, reliability, and efficiency, the Industrial Injection Stage 1 cylinder head delivers the airflow improvements and combustion sealing needed to help your engine perform at its full potential. NOTE: Fire Ring Gasket sold separately. The Industrial Injection 5.9L Cummins Performance Cylinder Head is engineered to increase airflow, durability, and combustion efficiency for 5.9L 24-Valve Cummins engines. Designed for diesel enthusiasts who want improved performance without sacrificing reliability, this fully CNC-ported cylinder head delivers the airflow and strength needed for daily driving, towing, and moderate horsepower builds. Using advanced 5-axis CNC porting technology, each cylinder head is precision machined to ensure every intake and exhaust port flows consistently. After the CNC process, each port is hand-blended for optimal airflow and combustion efficiency, helping your Cummins engine produce smoother power and improved throttle response. Performance-Driven Airflow and Strength This 5.9 Cummins performance head is designed to increase airflow while maintaining the structural integrity needed for high cylinder pressures. Balanced port flow helps improve engine efficiency and makes tuning easier by ensuring each cylinder produces consistent power. Fully assembled and ready to install, it is an ideal upgrade during engine rebuilds or performance upgrades. Built for Street, Tow, and Performance Applications The Industrial Injection performance cylinder head is built for diesel owners who demand increased durability and airflow from their third-generation 5.9 Cummins engine. Whether you're rebuilding a high-mileage engine or upgrading for better performance, this head provides the reliability and airflow improvements needed to support higher boost levels and improved engine efficiency.