What is the A/R ratio and how does it affect performance?

The A/R ratio (Area/Radius) of a turbine housing indicates its size. A larger A/R ratio, like the 1.15 in this housing, generally means the housing is larger. This allows it to flow more exhaust gas at higher RPMs, supporting more top-end power, but it may result in slightly slower initial spool-up compared to a smaller A/R housing.

What is the benefit of a divided T4 inlet flange?

A divided T4 inlet flange separates the exhaust pulses from each cylinder bank as they enter the turbine housing. This helps to maintain exhaust gas velocity and can improve turbine efficiency, leading to better performance and potentially quicker spool compared to a non-divided housing.

What does 'Not CARB approved' mean for buyers?

CARB (California Air Resources Board) approval indicates that a part meets specific emissions standards for use in California. 'Not CARB approved' means this part cannot be legally installed on a vehicle registered in California due to emissions regulations.

Specifications

Brand: Garrett
Part #: 757707-0015

Garrett G42 Turbine Housing Kit Div T4 / V-Band 1.15 A/R

Name: Garrett G42 Turbine Housing Kit Div T4 / V-Band 1.15 A/R
Brand: Garrett
SKU: garrett-garrett-g42-turbine-housing-kit-div-t4-v-band-1-15-a-r-t14-198924
Price: 1066.18 USD
Availability: BackOrder

$1066.18

On Backorder

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

Key Features

Fits T4 divided exhaust manifolds and V-band outlet connections.
Features a 1.15 A/R ratio for high-RPM power and sustained boost.
Divided inlet flange design improves turbine efficiency.
V-band outlet simplifies downpipe connection and sealing.
Manufactured by Garrett, a recognized leader in turbocharger technology.
Not CARB approved; cannot be shipped to California.

This turbine housing is designed for T4 divided exhaust manifolds and V-band outlet connections. Check your turbocharger's specifications to ensure compatibility.

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About this part

Product Details

This is the Garrett G42 Turbine Housing Kit with a 1.15 A/R ratio, designed for T4 divided exhaust manifolds and V-band outlet connections. This component is crucial for managing exhaust gas flow into the turbocharger's turbine wheel, directly impacting boost response and overall power delivery. Garrett is a well-known name in turbocharging, and this housing is built to handle the demands of high-performance forced induction setups.

The 1.15 A/R (Area/Radius) ratio is on the larger side, meaning it's designed to help the turbocharger spool up a bit later but sustain higher boost levels and power at higher RPMs. This makes it a good choice for applications where peak power and high-end performance are the priority, rather than immediate low-end throttle response. The divided T4 inlet flange helps to keep exhaust pulses separated, which can improve turbine efficiency and reduce backpressure compared to a non-divided housing. The V-band outlet simplifies the connection to your downpipe, making installation and removal more straightforward and ensuring a secure seal.

This kit includes the turbine housing itself. It's important to note that this part is not CARB approved and cannot be shipped to California. When building a forced induction system, selecting the correct turbine housing is key to matching the turbocharger to your engine's displacement and intended use. This Garrett housing offers a robust option for those looking to fine-tune their turbo system for maximum performance.