What is the A/R ratio of this turbine housing?

This BorgWarner EFR B2 turbine housing has an A/R ratio of .92. This ratio influences how quickly the turbocharger spools up and how much flow it can handle at higher engine speeds.

What does 'twin-scroll' mean for my turbo system?

A twin-scroll housing separates the exhaust pulses from different cylinder pairs. This separation helps to improve exhaust scavenging and allows the turbine wheel to spin up faster, leading to quicker boost response.

What is the flange type for this turbine housing?

This turbine housing is designed to bolt up to a T4 exhaust manifold flange. This is a common flange size for many performance turbocharger applications.

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

Name: BorgWarner Turbine Housing EFR B2 80mm .92 T4 Twin Scroll WG Assy
Brand: BorgWarner
SKU: borgwarner-borgwarner-turbine-housing-efr-b2-80mm-92-t4-twin-scroll-wg-assy-t14-4385222
Price: 1076.03 USD
Availability: InStock

BorgWarner Turbine Housing EFR B2 80mm .92 T4 Twin Scroll WG Assy

$1076.03

In Stock

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

Key Features

This product is a BorgWarner EFR B2 turbine housing with an 80mm inducer diameter.
It features a .92 A/R ratio for a balance of spool and top-end flow.
The housing is designed for a T4 exhaust manifold flange.
It includes an integrated twin-scroll wastegate assembly for boost control.
This component is not CARB approved and cannot be shipped to California.

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Product Details

What you get with this BorgWarner EFR B2 turbine housing kit is the housing itself, featuring an 80mm inducer diameter and a .92 A/R ratio, designed for a T4 flange. It also includes the integrated twin-scroll wastegate assembly, ready for installation. This component is a critical part of your turbocharger system, dictating exhaust gas flow into the turbine wheel and influencing spool characteristics and top-end power potential.

This housing is built with durability and performance in mind, using materials suited for the high temperatures and pressures found in exhaust systems. The twin-scroll design is a notable feature, as it separates exhaust pulses from cylinder pairs, allowing for more efficient energy transfer to the turbine wheel, especially at lower RPMs. This can lead to quicker turbocharger spool-up and improved throttle response compared to single-scroll designs. The .92 A/R ratio is a good balance, offering strong flow for higher horsepower targets while still allowing for reasonable boost response. The integrated wastegate assembly simplifies plumbing and ensures precise boost control.

When considering this turbine housing, remember it's not CARB approved and cannot be shipped to California. Ensure your overall turbo system is designed to take advantage of the flow characteristics of this housing. Proper tuning will be essential to maximize the benefits of the twin-scroll design and the .92 A/R ratio for your specific engine setup.