What is the benefit of a twin scroll turbine housing?

A twin scroll housing separates exhaust pulses from cylinder banks, directing them more efficiently to the turbine wheel. This design can lead to improved exhaust gas velocity and quicker turbocharger spool-up compared to a single scroll design.

What material is this turbine housing made from and why is it important?

This housing is made from high-nickel ductile iron. This material is chosen for its strength and its ability to withstand the high temperatures and thermal shock experienced in performance turbocharger applications.

What does the .92 A/R ratio signify?

The .92 A/R (Area/Radius) ratio describes the size of the turbine housing's volute. A .92 A/R is a moderate size that typically offers a good balance between quick turbo spool and sufficient exhaust flow for higher engine speeds.

BorgWarner Turbine Housing EFR B2 64mm .92 T4 Twin Scroll WG

Name: BorgWarner Turbine Housing EFR B2 64mm .92 T4 Twin Scroll WG Assy
Brand: BorgWarner
SKU: borgwarner-borgwarner-turbine-housing-efr-b2-64mm-92-t4-twin-scroll-wg-assy-t14-4385208
Price: 972.72 USD
Availability: BackOrder

BorgWarner Turbine Housing EFR B2 64mm .92 T4 Twin Scroll WG Assy

$972.72

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

BorgWarner Turbine Housing EFR B2 64mm .92 T4 Twin Scroll WG Assy

Key Features

This turbine housing is for the BorgWarner EFR B2 turbocharger frame.
Features a 64mm compressor wheel diameter.
Has a .92 A/R (Area/Radius) ratio for balanced spool and flow.
Utilizes a T4 twin scroll exhaust inlet for improved efficiency.
Constructed from high-nickel ductile iron for strength and thermal shock resistance.
Not CARB approved; cannot be shipped to California.

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Product Details

This BorgWarner EFR B2 turbine housing features a 64mm compressor wheel and a .92 A/R ratio with a T4 twin scroll inlet. The twin scroll design helps improve exhaust gas velocity and spool response by separating the exhaust pulses from each cylinder bank, leading to a more efficient flow into the turbine wheel. This housing is constructed from a high-nickel ductile iron, which is known for its strength and resistance to thermal shock, making it suitable for the high temperatures found in forced induction applications. The T4 flange offers a robust connection point for a wide range of turbocharger setups.

The EFR (Engineered for Racing) series from BorgWarner is built with performance in mind. This specific housing is designed to work with the EFR B2 frame turbos, offering a balance between quick spool and high-end power. The .92 A/R (Area/Radius) ratio is a moderate size that generally provides a good compromise for many performance applications, allowing for strong boost response without sacrificing top-end flow. It’s important to note that this housing is not CARB approved and cannot be shipped to California due to emissions regulations.

When building a custom turbo system or upgrading an existing one, selecting the right turbine housing is critical for achieving your desired powerband. This BorgWarner housing is a well-built component that offers a solid foundation for a performance turbocharger. Ensure you have the correct wastegate assembly and gaskets for installation, as these are often sold separately and are crucial for proper function and sealing.