What is the purpose of the A/R ratio on a turbine housing?

The A/R ratio, which stands for Area/Radius, determines the size and shape of the exhaust gas passage within the turbine housing. It directly influences how quickly the turbocharger spools up and how much airflow it can handle at higher engine speeds. A lower A/R like 0.72 generally promotes quicker spool, while a higher A/R supports more top-end power.

What type of connections does this turbine housing use?

This turbine housing utilizes V-Band connections for both the inlet and the outlet. V-Band connections use a clamp to secure two flanged ends together, creating a strong, leak-free seal that is often easier to install and remove than traditional bolt-on flanges.

Is this turbine housing compatible with all Garrett turbochargers?

No, this specific turbine housing is designed for the Garrett G25 series turbochargers, including the G25-550 and G25-660 models. It is not a universal fit for all Garrett turbochargers. Always confirm compatibility with your specific turbocharger model.

Garrett G25 Turbine Housing 0.72 A/R Standard Rotation 74090

Name: Garrett G25 Turbine Housing Kit O/V V-Band / V-Band 0.72 A/R - Standard Rotation
Brand: Garrett
SKU: garrett-garrett-g25-turbine-housing-kit-o-v-v-band-v-band-0-72-a-r-standard-rota-t14-211101
Price: 664.75 USD
Availability: InStock

Garrett G25 Turbine Housing Kit O/V V-Band / V-Band 0.72 A/R - Standard Rotation

$664.75

Only 9 left in stock

Garrett G25 Turbine Housing Kit O/V V-Band / V-Band 0.72 A/R - Standard Rotation.

Key Features

Fits Garrett G25-550 and G25-660 turbochargers.
Features an O/V V-Band inlet and a V-Band outlet for secure connections.
Has a 0.72 A/R ratio for a balance of spool speed and top-end airflow.
Constructed from durable cast iron to handle high temperatures and pressures.
Designed for standard rotation turbocharger applications.
Part number 740902-0069.

This turbine housing is designed for Garrett G25-550 and G25-660 turbochargers. Check manufacturer specifications for full compatibility details.

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Product Details

This is the Garrett G25 Turbine Housing Kit, featuring an O/V V-Band inlet and a V-Band outlet with a 0.72 A/R ratio for standard rotation. This component is crucial for managing exhaust gas flow into the turbine wheel of your Garrett G25-550 or G25-660 turbocharger. The A/R ratio, which stands for Area/Radius, dictates the flow characteristics of the housing, influencing spool speed and top-end power. A 0.72 A/R generally offers a good balance, allowing for relatively quick spool-up while still supporting strong airflow at higher RPMs.

Constructed from durable cast iron, this turbine housing is built to withstand the high temperatures and pressures associated with forced induction systems. The V-Band connections on both the inlet and outlet provide a secure and leak-free seal, simplifying installation and maintenance compared to traditional flanged setups. This kit is designed specifically for Garrett's G25 series turbochargers, ensuring proper fitment and optimal performance when paired with the corresponding compressor housing and internal components. It's important to note that this part is not CARB approved and cannot be shipped to California due to emissions regulations.

When installing this turbine housing, ensure you use the correct V-Band clamps and gaskets to achieve a proper seal. Proper exhaust manifold preparation and wastegate integration are also critical for the overall performance and longevity of your turbo system. This housing is a key piece for anyone looking to fine-tune their G25 turbocharger's performance characteristics for a specific application.