What is an A/R ratio and how does it affect performance?

The A/R ratio, or Area/Radius, of a turbine housing indicates the size of the exhaust gas passage relative to its radius. A larger A/R ratio, like the 1.01 in this housing, generally allows more exhaust gas flow. This can lead to better high-RPM power output and reduced backpressure, though it might slightly delay initial turbo spool.

What does 'open-wastegate' (O/V) mean for this housing?

An open-wastegate (O/V) design means this turbine housing does not have an integrated internal wastegate. You will need to use an external wastegate to control boost pressure effectively. This setup is common in high-performance applications where precise boost control is critical.

What are the benefits of V-Band connections?

V-Band connections use a clamp and a specialized flange to create a strong, leak-free seal. They are often easier and quicker to install and remove than traditional bolted flanges, making maintenance and adjustments more straightforward.

Garrett G45 Turbine Housing 1.01 A/R V-Band

Name: Garrett G45 Turbine Housing Kit O/V V-Band / V-Band 1.01 A/R - Standard Rotation
Brand: Garrett
SKU: garrett-garrett-g45-turbine-housing-kit-o-v-v-band-v-band-1-01-a-r-standard-rota-t14-488354
Price: 1114.82 USD
Availability: BackOrder

Garrett G45 Turbine Housing Kit O/V V-Band / V-Band 1.01 A/R - Standard Rotation

$1114.82

On Backorder

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

Garrett G45 Turbine Housing Kit O/V V-Band / V-Band 1.01 A/R - Standard Rotation

Key Features

Fits Garrett G45 turbocharger applications.
Features an open-wastegate (O/V) design.
Includes V-Band inlet and V-Band outlet connections for a secure seal.
Has a 1.01 A/R (Area/Radius) ratio for high-RPM power.
Designed for standard rotation turbochargers.
Requires an external wastegate for boost control.

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Product Details

This kit includes the Garrett G45 Turbine Housing with an open-wastegate (O/V) design, featuring V-Band inlet and outlet connections. It comes with a 1.01 A/R (Area/Radius) ratio and is set up for standard rotation. This housing is a key component for building or upgrading a turbocharger system, specifically designed to manage exhaust gas flow into the turbine wheel to influence spool characteristics and power delivery.

The 1.01 A/R ratio is on the larger side for this housing size, meaning it will typically allow the turbine to flow more exhaust gas. This generally translates to better high-RPM power potential and can help reduce backpressure at higher engine loads. The V-Band connections on both the inlet and outlet offer a strong, secure, and easy-to-seal method for connecting the housing to the rest of your exhaust and intake plumbing, often simplifying installation and maintenance compared to traditional flanged setups. The open-wastegate design means this housing does not have an internal wastegate port, requiring an external wastegate to control boost pressure.

This Garrett G45 turbine housing is a well-built component for performance-oriented forced induction builds. Its robust construction is designed to withstand the high temperatures and pressures associated with turbocharging. When selecting a turbine housing, consider your engine's displacement, camshaft profile, and intended use to best match the A/R ratio to your performance goals. This housing is intended for custom turbocharger applications where precise control over spool and top-end power is desired.