Description

Cummins ISX Engine Turbocharger Holset 4955306RX / 4045753 This Holset turbocharger (4955306RX / 4045753) is a premium replacement unit built to meet or exceed OEM specifications for Cummins ISX diesel engines used in heavy-duty truck and industrial applications. Designed for robust airflow and efficient boost delivery, this turbocharger helps restore lost power, improve torque characteristics, and enhance overall engine performance under demanding conditions. Featuring precision-balanced compressor and turbine wheels, a durable bearing and sealing system, and a high-temperature turbine housing, this turbocharger is engineered for long life in heavy-duty environments. It is compatible with Cummins ISX engines originally equipped with reference numbers 4955306RX or 4045753 , making it an ideal choice for replacement or engine rebuild projects. This turbocharger supports smooth acceleration, improved fuel utilization, and dependable performance across highway and vocational duties—making it well-suited for fleet operations, transport trucks, and commercial diesel applications. PRODUCT FEATURES & COMPONENTS Complete Holset turbocharger unit Precision-balanced compressor & turbine wheels Heavy-duty bearings and seals High-temperature turbine housing Designed to match factory airflow & boost profiles Tested for performance and durability ENGINE COMPATIBILITY ✔ Cummins ISX diesel engines OEM Reference Part Numbers: • 4955306RX • 4045753 (Always verify engine model and OEM part number before ordering.) VEHICLE & EQUIPMENT APPLICATIONS Suitable for use in: • Heavy-duty highway trucks • Long-haul and fleet transport vehicles • Vocational diesel trucks • Commercial truck applications • Industrial diesel equipment compatible with Cummins ISX engines KEY FEATURES & BENEFITS ✔ Restores factory boost pressure & torque ✔ Improves throttle response and engine efficiency ✔ Heavy-duty construction for extended service life ✔ OEM-equivalent performance and reliability ✔ Direct replacement turbo with no modification needed ✔ Ideal for maintenance, rebuilds, and repair projects Frequently Asked Questions Which engines does this turbocharger fit? This Holset turbocharger fits Cummins ISX diesel engines with OEM references 4955306RX or 4045753. Is this a direct replacement turbo? Yes, this turbocharger is designed as a direct replacement for the factory turbo on compatible Cummins ISX engines. Will this turbo improve my engine’s performance? It restores factory boost pressure, improves torque delivery and throttle response, and supports fuel efficiency when replacing a worn or failed turbo. Is this an OEM or aftermarket unit? This is a high-quality Holset replacement turbo that meets or exceeds OEM performance standards. Should installation be done by a professional? Yes. Professional installation is recommended to ensure correct fitment, boost calibration, and long-term reliability.