The (4309076RX-RMN) is a turbocharger. This is a new direct-fit replacement built to OEM specifications and backed by PT Turbo’s 12-month unlimited-mile warranty. This is a professionally remanufactured OEM turbocharger for Cummins ISX engines — precision-built for durability, power restoration, and long-haul reliability. Rebuilt in the USA using genuine OEM components only (no aftermarket internals), this turbo is fully disassembled, ultrasonically cleaned, inspected, and rebuilt with new OE-grade bearings, seals, and hardware. Rotating assemblies are VSR-balanced to 100,000 RPM and tested on flow benches before final inspection. Part Number: 4309076RX Cross Reference Part Numbers: 170-032-2398, 170-032-2484, 170-032-2555, 170-032-3148, 1700321112, 1700322398, 1700322484, 1700322555, 1700323148, 2836356, 2836357, 2838153, 2838154, 2840519, 2840520, 2840521, 2881785, 2881785NX, 2881785RX, 2881997, 2881997NX, 2881997RX, 3767615, 3767622, 3767630, 3774601, 3774612, 3774626, 3774640, 3780526, 3792776, 3792786, 3795162, 4042413, 4045031, 4045034, 4309076, 430907600, 430907600HX, 4309076HX, 4309076NX, 4309076RX, 4620744, 4955425, 4955425NX, 4955425RX, 4956010, 4956010NX, 4956010RX, 5350611, 5350641, 535064100, 5350893, 535089300H, 5350893H, 5350893HX, 5355196, 535519600, 535519600HX, 5355196H, 5355196HX, 5359785, 5359785NX, 5359785RX, 5456738, 545673800H, 5456738H, 5456815, 545681500H, 545681500HX, 5456815H, 5456815HX, 5457297, 5457297NX, 5457297RX, 5550526 Engine Application: Cummins ISX Diesel Engines Our Remanufacturing Process Includes: Full disassembly with industrial hot-wash and ultrasonic cleaning Crack and fatigue inspection; all worn or damaged components replaced VSR-balanced rotating assembly for OEM vibration tolerance New OE-grade bearings, thrust washers, and oil seals installed Housings resurfaced and restored to precise OEM tolerances Flow and boost bench tested prior to final inspection Why Choose Our Reman Turbos? Significant savings compared to new OEM units Built to OEM performance and durability standards Eco-friendly — keeps usable cores in circulation Covered by our 12-month limited warranty Important Note: This is a genuine remanufactured OEM unit. Core return policies may apply — please verify before purchasing. Professional installation is strongly recommended for best results. California buyers: Sales tax applies We respond to emails during business hours (Mon–Fri, Pacific Time). Closed on weekends and holidays. About This Remanufactured Holset HE561VE — Cummins ISX / ISX15 / QSX The Holset HE561VE is one of the largest variable geometry turbochargers in the Holset lineup, designed for the high-output Cummins ISX, ISX15, and QSX engine platforms. These engines power the most demanding applications in commercial trucking — heavy haulers, vocational trucks operating at maximum GVW, and high-horsepower stationary power generation. Part number 4309076RX covers the remanufactured exchange unit for this application. The HE561VE operates at extreme conditions: high exhaust temperatures, high boost pressures, and long continuous duty cycles that stress bearings and seals far more than typical automotive applications. When the HE561VE develops bearing wear or seal failure, the symptoms can include oil consumption exceeding normal limits, white or blue smoke at operating load, and boost pressure that fails to reach commanded levels. Remanufacturing Process Complete disassembly, ultrasonic cleaning, and inspection New journal bearings and upgraded thrust bearing assembly Full seal replacement — compressor and turbine piston rings and O-rings VGT nozzle ring and unison ring evaluation High-speed CHRA balancing before final assembly PT Turbo — Heavy-Duty Cummins Specialists PT Turbo has been rebuilding large-frame Holset turbochargers including the HE561VE since 1978 in San Bernardino, California. We stock cores for the ISX/ISX15/QSX platforms and can typically ship within one to two business days. Contact us with your engine serial number or OEM part number to confirm fitment before ordering, particularly on the QSX platform where multiple configurations exist. For the ISX/QSX pre-installation checklist and break-in procedure, see our guide to making your turbocharger last.