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

The A/R ratio, or Area/Radius, on a turbine housing dictates the size of the housing's internal passage. A higher A/R like 1.15 generally allows for more exhaust flow at higher RPMs, helping the turbocharger make more top-end power, while a lower A/R would promote quicker spool-up at lower engine speeds.

What does 'T4 Divided' inlet mean for my exhaust manifold?

A T4 divided inlet means the housing has an internal divider that separates the exhaust pulses from each cylinder bank of your engine. This design helps to improve the efficiency of the turbine wheel by preventing exhaust pulses from interfering with each other, potentially leading to better spool response and power.

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 it easier to clock or remove the downpipe during installation or maintenance compared to traditional flanged connections.

Garrett G45 Turbine Housing Kit 1.15 A/R T4 V-Band 757707-00

Name: Garrett G45 Turbine Housing Kit Div T4 / V-Band 1.15 A/R - Standard Rotation
Brand: Garrett
SKU: garrett-garrett-g45-turbine-housing-kit-div-t4-v-band-1-15-a-r-standard-rotation-t14-473234
Price: 1449.41 USD
Availability: BackOrder

Garrett G45 Turbine Housing Kit Div T4 / V-Band 1.15 A/R - Standard Rotation

$1449.41

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 1.15 A/R - Standard Rotation

Key Features

Includes Garrett G45 turbine housing.
Features a 1.15 A/R ratio for airflow management.
Designed with a T4 divided exhaust manifold inlet.
Utilizes a V-band exhaust outlet for secure connection.
Intended for standard rotation turbocharger setups.
Not CARB approved; cannot ship to California.

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Product Details

This kit includes the Garrett G45 turbine housing, designed for a T4 divided exhaust manifold entry and a V-band exhaust outlet. It features a 1.15 A/R (Area/Radius) ratio, which helps determine the exhaust gas flow characteristics and influences turbocharger spool speed and top-end power. This housing is intended for standard rotation turbocharger applications.

Garrett is well-known for its forced induction components, and this turbine housing is built to handle the demands of high-performance engines. The divided T4 inlet flange helps to separate exhaust pulses from each cylinder bank, which can improve turbocharger efficiency and reduce lag compared to a non-divided housing. The V-band outlet provides a strong and secure connection for your exhaust downpipe, making installation and maintenance more straightforward. The 1.15 A/R is a common choice for builds looking for a balance between quick spool-up and strong high-RPM power delivery, often suited for larger displacement engines or those seeking significant airflow.

When installing this turbine housing, ensure you have the correct V-band clamp and mating flange for your downpipe. Proper sealing at the manifold and downpipe connections is crucial for optimal performance and to prevent exhaust leaks. This part is not CARB approved and cannot be shipped to California.