Description

The HX55W Turbocharger (4046127 / 4040844) is a precision-engineered turbocharger compatible with Cummins QSX15 and ISX2 Signature 600 engines . Designed to meet OEM standards, this turbo restores engine boost pressure, improves torque delivery, and enhances throttle response. Built with precision-balanced turbine and compressor wheels , a durable bearing and seal system , and a high-temperature-resistant turbine housing , the HX55W turbo is engineered for reliable performance under heavy-duty operating conditions. Ideal for fleet maintenance, engine rebuilds, or replacing a worn turbo, it ensures long-term reliability and optimal diesel engine efficiency. This turbocharger is a direct-fit replacement for engines requiring part numbers 4046127 or 4040844 , delivering OEM-equivalent performance and restoring factory-rated power and torque. PRODUCT FEATURES & COMPONENTS Genuine HX55W turbocharger assembly Precision-balanced turbine and compressor wheels Heavy-duty bearings and seals High-temperature turbine housing for long service life Restores factory boost and torque Direct replacement for 4046127 / 4040844 OEM-equivalent performance and fit ENGINE COMPATIBILITY ✔ Cummins QSX15 engines ✔ Cummins ISX2 Signature 600 engines OEM / Reference Part Numbers: • 4046127 • 4040844 (Always verify engine model and OEM reference before ordering.) VEHICLE & EQUIPMENT APPLICATIONS • Heavy-duty highway trucks • Long-haul fleet vehicles • Vocational and industrial diesel engines • Commercial trucks with Cummins QSX15 / ISX2 engines KEY FEATURES & BENEFITS ✔ Restores factory-rated boost and torque ✔ Improves throttle response and engine efficiency ✔ Durable design for heavy-duty service ✔ OEM-quality HX55W turbocharger ✔ Direct-fit replacement for 4046127 / 4040844 ✔ Ideal for fleet maintenance, rebuilds, and replacements Frequently Asked Questions Which engines is this turbocharger compatible with? This HX55W turbo fits Cummins QSX15 and ISX2 Signature 600 engines with OEM references 4046127 or 4040844. Is this a genuine OEM replacement turbo? Yes, it is a brand new HX55W turbocharger built to OEM-equivalent standards for performance and durability. Will this turbo restore engine performance? Yes, it restores factory boost, torque, and throttle response for optimal diesel engine efficiency. Is this a direct-fit replacement? Yes, designed to directly replace HX55W turbos with part numbers 4046127 and 4040844. Should professional installation be performed? Professional installation is recommended to ensure correct fitment, boost calibration, and long-term reliability.