Description

This cylinder head is designed for Cummins ISB early 24V engines and replaces part number 3991773V. It is manufactured from high-strength cast iron and precision-machined to OEM standards for perfect valve alignment and combustion sealing. Ideal for medium-duty diesel applications, this head offers excellent thermal resistance, long-lasting durability, and smooth engine performance under demanding conditions. Application: Aftermarket Cummins B Series ISB Notes: 24 Valves Complete Cylinder Head Non-Common Rail Style Key Features OEM-quality replacement for Cummins 3991773V Fits early-model ISB 24-valve (5.9L) engines Ensures proper valve operation and combustion efficiency High-strength cast iron for durability and heat resistance Direct OEM-style fit for simple installation Compatibility Cummins ISB Early 24V (5.9L) Engines OEM Replacement Part #: 3991773V