What is the benefit of a 0.63 A/R ratio?

A 0.63 A/R (Area/Radius) ratio generally helps the turbocharger spool up faster. This means your engine will reach its boost threshold at lower RPMs, leading to improved throttle response and a more immediate feeling of power delivery.

What is the advantage of a V-band outlet?

V-band connections use a clamp to secure the housing to the downpipe, offering a more compact and often easier-to-install alternative to traditional flanged connections. They can also provide a more robust seal under high temperatures and pressures.

What does 'Hi Sil' mean for this turbine housing?

Hi Sil refers to the material composition of the housing, indicating it's made from high-silicon ductile iron. This material is chosen for its enhanced strength and resistance to high temperatures, which are common in the exhaust side of a turbocharger system.

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Specifications

Brand: Garrett
Part #: 740902-0015

Garrett GT30R Turbine Housing Kit O/V T4 / V-Band 0.63 A/R (Hi Sil)

Name: Garrett GT30R Turbine Housing Kit O/V T4 / V-Band 0.63 A/R (Hi Sil)
Brand: Garrett
SKU: garrett-garrett-gt30r-turbine-housing-kit-o-v-t4-v-band-0-63-a-r-hi-sil-t14-23428
Price: 505.46 USD
Availability: BackOrder

$505.46

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Garrett GT30R Turbine Housing Kit O/V T4 / V-Band 0.63 A/R (Hi Sil).

Key Features

Fits Garrett GT30R series turbochargers.
Features a T4 inlet flange for broad compatibility.
Includes a V-band outlet for a secure and compact connection.
Has a 0.63 A/R ratio, promoting quicker turbocharger spool.
Constructed from high-silicon (Hi Sil) ductile iron for durability.
Not CARB approved; cannot be shipped to California.

This turbine housing is designed for Garrett GT30R series turbochargers. Please verify compatibility with your specific turbocharger CHRA and exhaust system components.

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About this part

Product Details

This Garrett GT30R turbine housing is cast from high-silicon (Hi Sil) ductile iron, a material chosen for its strength and ability to handle the high temperatures found in turbocharger exhaust streams. It features a T4 inlet flange and a V-band outlet, making it a versatile option for custom turbo setups or upgrades where these specific connection types are required. The 0.63 A/R (Area/Radius) ratio is a key specification that influences how quickly the turbocharger spools up and where its power band sits. A smaller A/R like this one generally promotes faster spooling, meaning the turbo will start generating boost at lower engine RPMs, which is often desirable for improved throttle response off the line.

The V-band outlet is a modern connection method that uses a clamp to secure the housing to the downpipe. This design offers a more compact profile and can make installation and removal easier compared to traditional flanged connections. The T4 inlet flange is a common size for many performance turbochargers, providing a good balance between flow capacity and packaging space for a wide range of engine applications. This housing is designed to work with Garrett's GT30R series turbochargers, ensuring compatibility with the intended turbine wheel and center housing rotating assembly (CHRA) for optimal performance.

When considering this turbine housing, remember that it is not CARB approved and cannot be shipped to California. It's important to verify that the T4 inlet and V-band outlet configurations match your existing or planned exhaust manifold and downpipe setup. This component is a critical part of the exhaust side of your turbo system, directly impacting how efficiently exhaust gases are channeled to spin the turbine wheel.