Industrial Injection Fire Ring / CNC Ported Valve Bowls / CNC Exhaust Port / 150LBS Valve Springs

If you're rebuilding the top end of your 1994-1998 Dodge Ram 2500 or 3500, these cylinder heads from Industrial Injection are a solid choice for improved airflow and durability. They've been CNC ported on the intake and exhaust ports, meaning the passages are smoothed out and optimized for better air and fuel mixture to get into the cylinders and exhaust gases to get out more efficiently. This can lead to a noticeable improvement in how the engine breathes, especially under load.

Beyond the porting, these heads feature fire rings. These are essentially a strong metal ring pressed into the combustion chamber surface that helps create a more robust seal between the cylinder head and the engine block. This is especially important for engines that see heavy use or are modified, as it helps prevent combustion pressures from escaping the cylinder. The heads also come equipped with 150 lb valve springs. These are stronger than stock springs and are necessary to properly control the valves at higher RPMs and with more aggressive camshaft profiles, helping to prevent valve float and ensure consistent valve operation.

These heads are not CARB approved and cannot be shipped to California. They are designed for enhanced performance and durability, making them a good option for those looking to get more out of their Cummins engine. Be sure to check manufacturer instructions for any specific installation requirements or recommendations.