Is the 0.95 A/R G38 Turbine Housing Kit a good all-round choice?

For most twin-scroll builds, yes. The 0.95 A/R G38 Turbine Housing Kit sits between the 0.85 and 1.06 sizes, so it spools later than the smallest housing but frees up flow toward redline. Pick it when the engine sits in the middle of the 2.0L to 5.5L range Garrett gives for the G38 cores.

Can I use this housing on a GXR38-64 as well as a G38-1000?

Yes. Garrett publishes the same six turbine kits for the G38-1000 and the GXR38-64, so this housing fits either core, including both the V-band and hose compressor outlet versions of the GXR38-64. Moving between those cores later does not require a new turbine housing.

What does divided T4 mean on this housing?

It means the T4 inlet flange is split into two passages that stay separate up to the turbine wheel. That suits a twin-scroll manifold built with two runner groups. If the manifold has a single collector, choose the V-band inlet version of the 0.95 A/R G38 housing instead.

Is a super core included?

No. This part number is the turbine housing kit only. The center section and compressor come as a separate super core, either the G38-1000 G-Series II or one of the two GXR38-64 versions. Buying them apart lets a builder pick the A/R and inlet flange that suit the manifold.

What is the maximum speed for a G38 turbocharger?

Garrett publishes 125,000 rpm as the maximum turbocharger speed for both the G38-1000 and the GXR38-64. Running past that limit is at the risk of the owner and can damage the turbocharger. A speed sensor, sold separately, fits the machined port in the compressor housing so the tuner can watch shaft speed.

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Description

Garrett G38 Turbine Housing Kit, 0.95 A/R T4 Divided Inlet V-Band Outlet

Garrett’s G38 Turbine Housing Kit at 0.95 A/R is the middle size in the G38 range: a stainless steel turbine housing with a divided T4 inlet for twin-scroll manifolds, a V-band outlet, and an external wastegate layout. It bolts to either the G-Series II G38-1000 or the G-XRace GXR38-64, and Garrett sizes those cores for 2.0L to 5.5L engines. For most twin-scroll builds in that range this is the default pick, giving up a little response to the 0.85 A/R in exchange for more exhaust flow at high rpm. It is the wrong housing for an engine with an internally gated manifold.

Choosing the A/R

A/R is the ratio between the housing passage area and its distance from the turbine center. At 0.95 this G38 housing sits between the 0.85 and 1.06 options, so it moves the boost curve modestly later than the smallest housing while relieving backpressure near redline.

Features

Twin-scroll T4 inlet with the divider cast in, matched to a divided manifold
V-band outlet for a clamped downpipe joint
Middle of three A/R sizes in the G38 Turbine Housing Kit family

Specifications

Garrett part number: 757707-0043
A/R: 0.95
Turbine inlet and outlet: T4 divided and V-band
Divided inlet: Yes
Wastegate: External (free float)
Material: Stainless steel
Matching turbine wheel: 74mm inducer and 66mm exducer

Applications

This G38 Turbine Housing Kit is listed by Garrett for:

Garrett G38-1000 G-Series II: 938272-5003S super core
Garrett GXR38-64 G-XRace: 934173-5008S super core with V-band compressor outlet, 934173-5009S with hose outlet

Notes

An external wastegate is required, because this housing has no internal wastegate
The G38-1000 or GXR38-64 super core is sold separately
Garrett sets the maximum turbocharger speed of both listed cores at 125,000 rpm and states that running above it is at the owner’s risk
Also available in 0.85 and 1.06 A/R and in a V-band inlet version
Garrett does not publish a hardware list for this kit; confirm clamps and gaskets before ordering

Frequently Asked Questions

Is the 0.95 A/R G38 Turbine Housing Kit a good all-round choice? For most twin-scroll builds, yes. The 0.95 A/R G38 Turbine Housing Kit sits between the 0.85 and 1.06 sizes, so it spools later than the smallest housing but frees up flow toward redline. Pick it when the engine sits in the middle of the 2.0L to 5.5L range Garrett gives for the G38 cores.
Can I use this housing on a GXR38-64 as well as a G38-1000? Yes. Garrett publishes the same six turbine kits for the G38-1000 and the GXR38-64, so this housing fits either core, including both the V-band and hose compressor outlet versions of the GXR38-64. Moving between those cores later does not require a new turbine housing.
What does divided T4 mean on this housing? It means the T4 inlet flange is split into two passages that stay separate up to the turbine wheel. That suits a twin-scroll manifold built with two runner groups. If the manifold has a single collector, choose the V-band inlet version of the 0.95 A/R G38 housing instead.
Is a super core included? No. This part number is the turbine housing kit only. The center section and compressor come as a separate super core, either the G38-1000 G-Series II or one of the two GXR38-64 versions. Buying them apart lets a builder pick the A/R and inlet flange that suit the manifold.
What is the maximum speed for a G38 turbocharger? Garrett publishes 125,000 rpm as the maximum turbocharger speed for both the G38-1000 and the GXR38-64. Running past that limit is at the risk of the owner and can damage the turbocharger. A speed sensor, sold separately, fits the machined port in the compressor housing so the tuner can watch shaft speed.

About Garrett

Garrett Motion has turbocharged engines since 1955, when its T15 was matched to the Caterpillar D9 crawler, and in 1962 a Garrett turbocharger went into the Oldsmobile Jetfire Turbo Rocket, the first turbocharged production car. Garrett has supplied turbocharging in Formula 1 with Scuderia Ferrari, the FIA World Rally Championship and the 24 Hours of Le Mans. It has operated as a stand-alone company since 2018, and its technology is fitted to around 150 million vehicles worldwide.

Additional Information

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BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Garrett G38 Turbine Housing Kit, 0.95 A/R T4 Divided Inlet V-Band Outlet [757707-0043]

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Garrett G38 Turbine Housing Kit, 0.95 A/R T4 Divided Inlet V-Band Outlet

Choosing the A/R

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews