What is the A/R ratio and why does it matter?

The A/R ratio, in this case .85, refers to the area-to-radius ratio of the turbine housing's volute. A higher A/R like .85 generally allows for better high-RPM flow and top-end power, while a lower A/R would spool up faster. This .85 ratio offers a good balance for many performance applications.

What does 'VOF WG' mean for the wastegate port?

VOF WG stands for 'Vertical Outlet Flange Wastegate'. This indicates that the housing is designed to accept an internal wastegate that mounts vertically, allowing for integrated boost control directly within the turbine housing assembly.

Can this turbine housing be used with any turbocharger?

This turbine housing is specifically designed for BorgWarner EFR B1 series turbochargers. While it uses a common T25 flange, it's intended to mate with the corresponding compressor cover and internal components of the EFR B1 platform for optimal performance and fit.

BorgWarner EFR B1 Turbine Housing 11631008000

Name: BorgWarner Turbine Housing EFR B1 63mm .85 T25 VOF WG
Brand: BorgWarner
SKU: borgwarner-borgwarner-turbine-housing-efr-b1-63mm-85-t25-vof-wg-t14-4385198
Price: 618.60 USD
Availability: BackOrder

BorgWarner Turbine Housing EFR B1 63mm .85 T25 VOF WG

$618.60

On Backorder

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

BorgWarner EFR B1 turbine housing with a .85 A/R and 63mm wheel.

Key Features

Fits BorgWarner EFR B1 turbocharger assemblies.
Features a 63mm compressor wheel.
Includes a .85 A/R exhaust housing.
Utilizes a T25 turbine inlet flange.
Equipped with an internal wastegate port (VOF WG).
Constructed from durable cast iron for high-temperature resistance.

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Product Details

This BorgWarner EFR B1 turbine housing features a 63mm compressor wheel and a .85 A/R ratio, designed for optimal exhaust gas flow into the turbine. The T25 flange makes it a versatile option for many custom turbocharger setups, and the internal wastegate port (VOF WG) allows for precise boost control without needing an external unit. This housing is constructed from a durable cast iron material, chosen for its ability to withstand the high temperatures and pressures found in forced induction systems.

The .85 A/R (area-to-radius) ratio on this housing strikes a balance between quick turbo spool-up and the ability to sustain high boost levels at higher RPMs. This means you get a more responsive engine when you're just getting into the throttle, and the power doesn't fall off dramatically as the engine revs climb. The 63mm wheel size is also a key factor in determining the turbocharger's overall flow capacity and power potential. This housing is a well-built component that forms the crucial exhaust side of a performance turbocharger assembly.

When building a custom turbo system, selecting the right turbine housing is critical for achieving your desired performance characteristics. This BorgWarner housing is a popular choice for tuners looking to build a reliable and potent setup. Please note that this part is not CARB approved and cannot be shipped to California. Always consult with a professional when designing or installing a custom turbo system to ensure proper fitment and function.