BorgWarner Turbine Housing EFR B2 74mm 1.05 T4 Twin Scroll

This BorgWarner turbine housing is selected by exact manufacturer part number 12741019002 and complete turbo-system specifications. Confirm every wheel, housing, flange, A/R, connection, orientation, and wastegate requirement before ordering.

Key Features

• 1.05 A/R Ratio: Balances low-end response with high RPM flow supports 450-850 hp on 2.0-3.0L engines.
• Twin Scroll T4 Inlet: Divided pulses improve turbine efficiency cuts backpressure and accelerates spool by 300-500 RPM versus single scroll.
• EFR 7670 Compatible: Precision cast for bolt-on fit to B2 center sections ensures zero leaks and peak boost control.
• NiResist Material: Nickel-iron alloy endures 1050C exhaust gas temperatures resists cracking for long-term reliability.
• Investment cast housings deliver consistent flow and heat management.
• Yes this is the OEM replacement turbine housing for all BorgWarner EFR 7670 B2 frame turbos with 74mm wheels.

Fitment

Specifications

What’s Included

One new BorgWarner product in the exact configuration identified by manufacturer part number 12741019002. 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 EFR B2 80mm 1.05 T4 Twin Scroll
• BorgWarner Turbine Housing EFR B2 74mm .92 T4 Twin Scroll WG Assy
• BorgWarner Turbine Housing EFR B2 80mm 1.45 T4 Twin Scroll (H Type)

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.