BorgWarner Turbine Housing SX S400 T4 A/R .90 Twin Scroll

This BorgWarner turbine housing is selected by exact manufacturer part number 177102 and complete turbo-system specifications. Confirm every wheel, housing, flange, A/R, connection, orientation, and wastegate requirement before ordering.

Key Features

• NiResist Material: High-temperature ductile iron withstands extreme heat and pressure in high-boost setups.
• Twin Scroll T4 Inlet: Separates exhaust pulses for reduced backpressure and quicker turbo response on multi-cylinder diesels.
• A/R.90 Ratio: Balances low-end torque with top-end power ideal for street and track Cummins applications.
• Direct SX-S400 Fit: Bolts to BorgWarner S400 center housings for seamless upgrades in custom turbo configurations.
• Builds components with precision casting for consistent flow.
• Requires T4 divided exhaust manifold or adapter for twin scroll setup.

Fitment

Specifications

What’s Included

One new BorgWarner product in the exact configuration identified by manufacturer part number 177102. 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 Turbine Housing SX S400 T4 A/R 1.00 83/74mm Twin Scroll
• BorgWarner Turbine Housing SX S400 T4 A/R 1.10 83/74mm Twin Scroll
• BorgWarner Turbine Housing S400SX SX .90 A/R-T4 VTF (87mm)

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 turbine housing 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.