BorgWarner Turbo S400SX SX 67.7mm (91/83)

This BorgWarner turbocharger is selected by exact manufacturer part number 178855 and complete turbo-system specifications. Confirm every wheel, housing, flange, A/R, connection, orientation, and wastegate requirement before ordering.

Key Features

• Dual Ceramic Ball Bearing CHRA: Cuts friction for quicker spool times and withstands 150000+ miles of abuse.
• SX-E 67.7/91mm Compressor Wheel: Flows 110+ lbs/min of air to feed 1400 HP engines with surge resistance.
• 83mm Inconel Turbine Wheel: Endures 1700+ degree exhaust temps for reliable high-boost operation.
• T4 Divided 1.32 A/R Turbine Housing: Balances low-end response with top-end exhaust flow for diesel trucks.
• Machines every wheel from billet aluminum and Inconel.
• Billet aluminum compressor wheel Ni-Resist turbine housing and 360-degree aluminum compressor cover.

Fitment

Specifications

What’s Included

One new BorgWarner product in the exact configuration identified by manufacturer part number 178855. Gaskets, lines, clamps, housings, actuators, sensors, hardware, and companion components are included only when expressly stated for this part number.

About BorgWarner

BorgWarner develops original-equipment and performance turbocharging systems, including EFR, AirWerks, S-Series, K-Series, SuperCore assemblies, housings, cartridges, actuators, and service components.

Related BorgWarner Products

• BorgWarner Turbo S400SX SX 80mm (110/87)
• BorgWarner S300 SX-E (360 Thrust) Turbo Repair Kit
• BorgWarner Super Core S400SX SX 67.7mm (91/83)

Browse the BorgWarner collection for related turbochargers, housings, assemblies, actuators, and service components.

Frequently Asked Questions

How do I confirm this BorgWarner part matches my turbo system?
Match the exact BorgWarner part number, turbo family, compressor and turbine wheel sizes, housing A/R, flange, inlet and outlet geometry, bearing housing, wastegate configuration, and every connection before ordering.

Is this BorgWarner turbocharger a direct replacement?
Only when the exact part number, dimensions, housings, flanges, rotation, wastegate configuration, oil and coolant connections, and vehicle or system application all match. Similar turbo families are not automatically interchangeable.

What supporting parts should be inspected during installation?
Inspect or replace the oil feed and drain, coolant lines, gaskets, fasteners, intake and charge piping, intercooler, exhaust connections, wastegate hardware, and filtration components. Correct the cause of the previous turbo failure before startup.

Installation Instructions

Follow BorgWarner’s current instructions and the vehicle or system service information for this exact part number. Verify every interface before disassembly, correct the cause of any prior turbo failure, prime the oil system, keep debris out of all passages, use new required seals and fasteners, confirm free rotation and line routing, and check for leaks before load. Professional turbo-system installation and calibration are recommended.