Power Your Haul: The Unbreakable Cummins ISX Head Built for Truckers' Toughest Routes Revitalize your Cummins ISX 1999-2010 DOHC engine with the BPS Stage 3 Cylinder Head, a brand new powerhouse engineered for the relentless demands of heavy-duty trucking. This fully loaded assembly comes complete with high-performance Inconel intake and exhaust valves to withstand extreme conditions, along with springs and cam bearings from a fresh casting that exceeds OE specifications for superior strength and reliability. Designed to hold up under intense heat, pressure, and vibrations that can crack lesser heads, it's ready to bolt on straight from the box—no modifications or core returns required. Whether you're logging endless highway miles or hauling massive loads through rugged terrain, count on this cylinder head to deliver explosive torque gains, enhanced efficiency, and reduced downtime—keeping your rig at peak integrity without the headaches of frequent repairs. Key Features Brand New Stage 3 Casting: Fresh, high-strength construction that surpasses OE durability, preventing cracks and failures in harsh operating environments for extended service life. Fully Loaded Assembly: Pre-installed with valves, springs, and cam bearings for quick, hassle-free bolt-on installation—saving truckers time and labor costs. Inconel Intake and Exhaust Valves: Advanced alloy valves thrive in extreme temperatures, providing consistent sealing and power delivery during demanding hauls. Exceeds OE Specifications: Optimized for superior performance, promoting better combustion, torque, and fuel economy without custom adjustments. No Core Required: Eliminate the inconvenience of returning old parts; this is a straightforward new purchase for immediate upgrades. Stage 3 Upgrade Defined: High-strength casting + Inconel intake AND exhaust valves for extreme heat resistance + optimized coolant flow and reinforced fire deck. Fully assembled, bolt-on ready. No core return required. Designed to handle heavy-hauling or high-horsepower applications. Exceeds OE durability specs. Cross References OEM: 4962732 OEM: 4331387 OEM: 4962731 OEM: 5413782 OEM: 5413784 OEM: 5658283 OEM: 4101420R