What is the A/R ratio and why does it matter?

The A/R ratio, or Area/Radius, describes the size of the turbine housing's internal passages. A 0.82 A/R ratio on this housing generally favors higher RPM power by allowing the turbine to spin more freely at higher exhaust flow rates. It's a key factor in determining how the turbocharger will perform across the engine's RPM range.

What is Ni-Resist material?

Ni-Resist is a type of cast iron alloy that contains nickel. It's chosen for turbine housings because it offers excellent resistance to high temperatures and corrosion, which are common challenges in the exhaust side of a turbocharger. This durability helps ensure the housing withstands extreme conditions over time.

What does 'internal wastegate' mean for this housing?

This turbine housing is designed to work with a turbocharger that has an internal wastegate. This means the wastegate actuator and valve are integrated into the turbine housing itself, controlling boost pressure by bypassing exhaust gas around the turbine wheel when a set pressure is reached.

Garrett GT30R Turbine Housing 0.82 A/R T3 771300-0005

Name: Garrett GT30R THWA 0.82 A/R T3 (int w/g - 5 bolt out) (Ni-Resist)
Brand: Garrett
SKU: garrett-garrett-gt30r-thwa-0-82-a-r-t3-int-w-g-5-bolt-out-ni-resist-t14-22838
Price: 526.21 USD
Availability: InStock

Garrett GT30R THWA 0.82 A/R T3 (int w/g - 5 bolt out) (Ni-Resist)

$526.21

Only 1 left in stock

Garrett GT30R turbine housing, 0.82 A/R, T3 inlet with wastegate. Part# 771300-0005.

Key Features

Fits Garrett GT30R turbochargers.
Features a 0.82 A/R (Area/Radius) ratio for exhaust flow.
T3 inlet flange for exhaust manifold connection.
Designed for use with an internal wastegate.
Standard 5-bolt exhaust outlet pattern for downpipe connection.
Constructed from Ni-Resist material for high-temperature strength and corrosion resistance.

This is a turbine housing for a Garrett GT30R turbocharger and is not vehicle-specific. Compatibility depends on the turbocharger model and the overall engine build. Not CARB approved; cannot ship to California.

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Product Details

This is a Garrett GT30R turbine housing, specifically the THWA model with a 0.82 A/R ratio and a T3 inlet. It's designed for use with an internal wastegate and features a 5-bolt exhaust outlet. The housing is constructed from Ni-Resist, a material known for its excellent high-temperature strength and corrosion resistance, making it well-suited for the demanding environment of a turbocharger.

The 0.82 A/R (Area/Radius) ratio on this housing helps to balance exhaust gas flow and turbine speed. A larger A/R like this one generally promotes better top-end power by allowing the turbine to spool more freely at higher RPMs, while a smaller A/R would typically improve low-end response. This particular housing is built to handle the exhaust gases from a GT30R turbocharger, a popular choice for performance builds where increased horsepower is the goal. The Ni-Resist material is crucial here, as it can withstand the extreme heat generated by exhaust gases without deforming or cracking, ensuring long-term reliability.

This turbine housing is intended as a replacement or upgrade component for a Garrett GT30R turbocharger. It utilizes a standard 5-bolt exhaust flange pattern for the downpipe connection. Please note that this part is not CARB approved and cannot be shipped to California. Always consult your turbocharger manufacturer's specifications and a qualified mechanic to ensure this housing is the correct fit for your specific turbocharger and application.