BorgWarner 12747100009 EFR 9174 Turbo CHRA Cartridge Cast Iron Bearing Housing

The BorgWarner 12747100009 is a replacement CHRA (Center Housing Rotating Assembly) cartridge designed specifically for the EFR 9174 turbocharger with cast iron bearing housing. This cartridge provides a cost-effective solution for rebuilding an EFR turbo when only the bearings or internal rotating components are damaged, eliminating the need to purchase a complete SuperCore assembly.

Key Features:

• Cast iron bearing housing construction for maximum durability
• Dual ceramic ball bearing assembly for superior performance and longevity
• Compressor wheel specifications: 101.6mm (4.0") inducer, 63.5mm (2.5") exducer
• Turbine wheel: 74mm exducer diameter
• Power range: 600-1000 horsepower
• Compatible with EFR 9174 turbine and compressor housings
• Speed sensor port integrated

Important Installation Notes:

This CHRA does not include the turbine housing or compressor housing. Your existing housings must be in good condition without scratches or internal damage. Additional mounting kits for turbine and compressor housings are required. If your turbine housing features a wastegate flap, you will also need an internal wastegate actuator and mounting plate.

The EFR 9174 is a hybrid turbocharger that combines a high-flowing 91mm compressor with a fast-spooling 74mm turbine wheel, making it ideal for high-performance applications requiring extreme boost levels and high shaft speeds. This turbo slots between the 8374 and 9180 models, offering more power than the 8374 with earlier spool characteristics than the 9180.