Industrial Injection 03-07 Dodge 5.9L Engine Fire Ring/Ported Valve Bowls/Exhaust Port

If you're looking to get the most out of your 2003-2007 Dodge 5.9L Cummins engine, especially if you're pushing higher boost levels or towing heavy loads, a set of performance cylinder heads can make a significant difference. This set from Industrial Injection is built to handle more stress and improve airflow, helping your engine breathe easier and perform better under demanding conditions.

These heads start with a well-built casting that's been extensively modified. They feature fire rings, which are essentially a metal ring pressed into the combustion chamber. This ring creates a tighter seal between the cylinder head and the head gasket, significantly increasing the clamping force around the combustion chamber. This is crucial for preventing head gasket failures when you're running higher cylinder pressures from increased boost. Beyond the fire rings, the valve bowls have been ported. This means the passages where the air and fuel mixture enters and exhaust gases exit have been smoothed and reshaped to allow for a smoother, less restricted flow of gases. This improved airflow can lead to better combustion efficiency and more power. The exhaust ports have also been addressed to further enhance exhaust gas scavenging.

This is a substantial upgrade for your 5.9L Cummins. It's important to note that these heads are not CARB approved and cannot be shipped to California. When installing, ensure you follow the manufacturer's recommended procedures for head gasket installation and torque sequences, as proper setup is critical for the longevity and performance of these modified heads.