What does the 1.24 A/R ratio mean for my turbocharger?

The A/R ratio, or Area/Radius ratio, measures the size and shape of the turbine housing's internal passages. A 1.24 A/R generally means the housing is larger, which can help the turbocharger produce more top-end power and maintain boost at higher engine speeds, though it might spool slightly slower than a smaller A/R housing.

What material is this turbine housing made from?

This turbine housing is constructed from cast iron, a material chosen for its ability to withstand the high temperatures and pressures generated by exhaust gases in a forced induction system.

Can this part be shipped to California?

No, this turbine housing kit is not CARB approved and cannot be shipped to California due to emissions regulations.

Garrett GT55 Turbine Housing 1.24 A/R 761208-0025

Name: Garrett GT55 Turbine Housing Kit O/V 1.24 A/R
Brand: Garrett
SKU: garrett-garrett-gt55-turbine-housing-kit-o-v-1-24-a-r-t14-22828
Price: 924.15 USD
Availability: BackOrder

Garrett GT55 Turbine Housing Kit O/V 1.24 A/R

$924.15

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Garrett GT55 Turbine Housing Kit O/V 1.24 A/R

Key Features

Fits Garrett GT55 series turbochargers.
Features a 1.24 A/R ratio for optimized exhaust flow.
Constructed from durable cast iron to handle high temperatures and pressures.
Designed to promote top-end power and sustained boost at higher RPMs.
Part number 761208-0025.

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Product Details

Garrett is well-known for its high-performance turbochargers and components, and this GT55 Turbine Housing Kit is a prime example of their commitment to forced induction excellence. This specific housing is designed for the GT55 series turbochargers, offering a 1.24 A/R ratio. The A/R (Area/Radius) ratio is a critical measurement that dictates the flow characteristics of the turbine housing, directly impacting how quickly the turbocharger spools up and the overall powerband it can achieve. A 1.24 A/R generally indicates a housing that favors top-end power and sustained boost at higher RPMs, making it suitable for applications where maximum airflow and peak horsepower are the primary goals.

This kit includes the turbine housing itself, ready to be paired with your GT55 turbocharger assembly. The cast iron construction is built to withstand the extreme temperatures and pressures found in high-performance exhaust systems. Proper installation of a turbine housing is crucial for turbocharger longevity and performance. It's important to ensure the housing is correctly clocked to your compressor housing and that all connections are sealed properly to prevent exhaust leaks. Because this part is not CARB approved, it cannot be shipped to California.