What is the A/R ratio, and how does 1.44 affect performance?

The A/R ratio (Area/Radius) on a turbine housing dictates the flow rate of exhaust gases through the turbine wheel. A 1.44 A/R is a larger ratio, generally favoring higher RPM power output and helping to reduce exhaust backpressure. This can lead to better top-end performance but might slightly increase the time it takes for the turbo to reach full boost (spool).

What does 'T4 divided' entry mean for my exhaust system?

A T4 divided entry means the exhaust manifold's exhaust ports are separated within the turbine housing's inlet flange. This separation helps manage exhaust pulses from individual cylinders or cylinder banks, leading to more efficient turbine operation and potentially quicker spool compared to an undivided housing.

What is the advantage of a V-band outlet?

The V-band outlet uses a clamp system to secure the downpipe to the turbine housing. This method creates a strong, leak-free seal and makes installation and removal easier compared to traditional flanged connections, which often require gaskets and multiple bolts.

Garrett G45 Turbine Housing Kit 1.44 A/R T4 V-Band 757707-00

Name: Garrett G45 Turbine Housing Kit Div T4 / V-Band 1.44 A/R - Standard Rotation
Brand: Garrett
SKU: garrett-garrett-g45-turbine-housing-kit-div-t4-v-band-1-44-a-r-standard-rotation-t14-473236
Price: 1585.68 USD
Availability: BackOrder

Garrett G45 Turbine Housing Kit Div T4 / V-Band 1.44 A/R - Standard Rotation

$1585.68

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 Div T4 / V-Band 1.44 A/R - Standard Rotation

Key Features

This kit includes the Garrett G45 Turbine Housing.
Features a T4 divided entry for improved exhaust pulse management.
Equipped with a V-band outlet for a secure and easy connection.
Has a 1.44 A/R ratio, optimized for top-end power and flow.
Designed for standard rotation turbocharger applications.
Not CARB approved; cannot be shipped to California.

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Product Details

This kit includes the Garrett G45 Turbine Housing, designed for T4 divided entry with a V-band outlet and a 1.44 A/R ratio for standard rotation. This housing is a key component for building or upgrading a high-performance forced induction system, allowing you to tune your turbocharger's response and powerband characteristics. The divided T4 entry helps manage exhaust pulses, leading to improved spool characteristics and reduced turbo lag compared to undivided housings.

The 1.44 A/R (Area/Radius) ratio is chosen to optimize exhaust flow for larger displacement engines or applications seeking maximum top-end power. This specific ratio works well with the G45 series turbochargers, helping to maintain boost pressure at higher RPMs. The V-band outlet simplifies installation and ensures a secure, leak-free connection to your exhaust system, often preferred for its ease of use and reliability over traditional flanged connections. Garrett is known for well-built turbocharger components, and this housing is no exception, offering a solid foundation for a custom turbo setup.

When considering a turbine housing like this, remember that the A/R ratio significantly impacts how the turbocharger behaves. A larger A/R, like the 1.44 here, generally favors top-end power and can help reduce backpressure on the exhaust side, but it might slightly increase spool time compared to a smaller A/R. This housing is intended for custom applications where precise tuning of the turbo's performance curve is desired. Please note that this part is not CARB approved and cannot be shipped to California.