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

The A/R ratio, or area-to-radius ratio, on a turbine housing measures the flow capacity of the housing. A .83 A/R ratio, like on this housing, generally offers a good balance between allowing sufficient exhaust gas flow for higher horsepower and helping the turbocharger spool up relatively quickly.

What does 'single scroll' mean for this turbine housing?

A single scroll turbine housing directs exhaust gases from all cylinders into the turbine wheel through a single inlet passage. This is a simpler design compared to twin-scroll housings and is common in many performance applications.

What is the benefit of a BorgWarner EFR turbine housing?

BorgWarner EFR (Engineered for Racing) components are known for their robust construction and performance-oriented design. This housing is built to handle the demanding conditions of high-performance engines and help optimize turbocharger efficiency.

BorgWarner EFR Turbine Housing .83 T3 12741008000

Name: BorgWarner Turbine Housing EFR B2 74mm .83 T3 Single Scroll WG Assy
Brand: BorgWarner
SKU: borgwarner-borgwarner-turbine-housing-efr-b2-74mm-83-t3-single-scroll-wg-assy-t14-4385214
Price: 650.68 USD
Availability: BackOrder

BorgWarner Turbine Housing EFR B2 74mm .83 T3 Single Scroll WG Assy

$650.68

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 B2 turbine housing, 74mm, .83 A/R, T3 single scroll WG.

Key Features

Fits BorgWarner EFR B2 series turbochargers.
Features a 74mm turbine wheel.
Has a .83 A/R (area-to-radius) ratio for balanced flow and spool.
Designed for a T3 single scroll turbocharger application.
Includes a wastegate assembly.
Constructed from durable, high-temperature resistant materials.

This turbine housing is designed for BorgWarner EFR B2 series turbochargers. Please verify compatibility with your specific turbocharger model and application.

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Product Details

If you're building a custom turbo system or upgrading an existing setup, selecting the right turbine housing is key to matching your turbocharger's airflow characteristics to your engine's needs. This BorgWarner EFR B2 turbine housing, with its 74mm wheel size and .83 A/R ratio, is designed for single scroll T3 turbocharger applications that utilize a wastegate assembly. It's a well-built component that helps define the upper RPM range and boost response of your turbo.

This housing is cast from durable materials to withstand the high temperatures and pressures found in exhaust systems. The .83 A/R (area-to-radius) ratio is a moderate size that typically balances good flow for higher horsepower with reasonable spool-up for streetable performance, making it a popular choice for many performance builds. The T3 flange is a common mounting point for many turbochargers, and the single scroll design simplifies plumbing compared to twin-scroll setups. This particular housing is intended for use with a wastegate assembly, allowing for precise boost control.

When considering a turbine housing like this, it's important to match it with the appropriate compressor housing and other engine components to achieve your desired powerband. This part is not CARB approved and cannot be shipped to California. Always consult with your engine builder or turbo specialist to ensure this housing is the correct choice for your specific application and performance goals.