What is the purpose of a divided T4 inlet on a turbine housing?

A divided T4 inlet separates the exhaust pulses from each cylinder. This helps prevent exhaust gases from interfering with each other, leading to more efficient spool-up and a broader powerband.

How does the 1.19 A/R ratio affect turbocharger performance?

The 1.19 A/R ratio is considered a larger housing size. It generally favors higher RPM power and top-end flow, meaning it may take slightly longer to reach full boost compared to a smaller A/R, but it allows for greater airflow at higher engine speeds.

What is the material of this turbine housing and why is it important?

This housing is made from high-nickel ductile iron. This material is chosen for its robust strength and its ability to withstand the extreme heat and thermal cycling common in exhaust systems, helping to prevent cracking or warping.

Specifications

Brand: Garrett
Part #: 757707-0035

Garrett G40 Turbine Housing Kit Div T4 / V-Band 1.19 A/R - Standard Rotation

Name: Garrett G40 Turbine Housing Kit Div T4 / V-Band 1.19 A/R - Standard Rotation
Brand: Garrett
SKU: garrett-garrett-g40-turbine-housing-kit-div-t4-v-band-1-19-a-r-standard-rotation-t14-478906
Price: 924.49 USD
Availability: BackOrder

$924.49

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Garrett G40 Turbine Housing Kit for T4/V-Band with 1.19 A/R. A solid choice for improved exhaust flow.

Key Features

This is a Garrett G40 Turbine Housing Kit.
Features a T4 divided entry flange for improved exhaust pulse separation.
Includes a V-band outlet for a secure and easy downpipe connection.
Has a 1.19 A/R ratio, suitable for optimizing exhaust flow and spool characteristics.
Constructed from high-nickel ductile iron for strength and thermal shock resistance.
Designed for standard rotation Garrett G40 series turbochargers.

This turbine housing is designed for Garrett G40 series turbochargers with standard rotation. Please verify compatibility with your specific turbocharger model.

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About this part

Product Details

If you're building a high-performance turbo system and need to fine-tune your exhaust flow and spool characteristics, this Garrett G40 Turbine Housing Kit is a key component. This kit is designed for the Garrett G40 series turbochargers and features a T4 divided entry flange for improved exhaust pulse separation and a V-band outlet for a secure and easy connection to your downpipe. The 1.19 A/R ratio is chosen to help optimize exhaust gas velocity and turbine speed for a broad powerband, especially in applications looking for strong top-end power.

This turbine housing is constructed from a high-nickel ductile iron, a well-built material known for its strength and resistance to thermal shock under extreme exhaust temperatures. The divided T4 inlet helps keep exhaust pulses from interfering with each other, promoting more efficient spool-up and a more consistent power delivery. The V-band outlet simplifies installation and ensures a leak-free seal, which is crucial for maintaining boost pressure and preventing exhaust leaks. This housing is intended for standard rotation turbochargers, ensuring compatibility with your existing G40 turbo setup.

When selecting a turbine housing, the A/R ratio plays a significant role in how the turbocharger behaves. A 1.19 A/R is generally considered a larger housing, favoring higher RPM power and top-end flow over the quickest possible spool. This makes it a popular choice for builds aiming for maximum horsepower where a slight delay in initial boost is acceptable. Remember that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly.