Does the 1.28 A/R G45 Turbine Housing Kit suit a 6.0L V8?

Usually, yes. The 1.28 A/R G45 Turbine Housing Kit flows more than the 1.01 and 1.15 sizes, which suits larger engines in the 2.0L to 8.0L range Garrett gives for G45 cores. The 1.44 goes further still for engines that live at high rpm.

Which G45 cores have the largest compressors?

The GXR45-82 with an 82.9mm inducer, the GXR45-80 at 80.9mm and the G45-1600 at 80mm. Garrett rates them at up to 1800, 1750 and 1600 horsepower respectively, and they benefit most from a larger housing like this one, because their compressors move enough air to keep a big turbine housing busy.

Is the housing different for G-Series and G-Series II cores?

No. Garrett states that G-Series II uses the first-generation compressor and turbine housings, so the G45-1610 shares this housing with the G45-1475, G45-1500 and G45-1600. A Gen I owner can fit the G-Series II CHRA, 938338-5004S, and keep the housing.

Do I need a twin-scroll manifold?

Yes. This version has a divided T4 inlet and needs a manifold ending in a matching divided T4 flange. A single V-band collector pairs with the 1.28 A/R V-band inlet housing, Garrett part 757707-0021. The two share the A/R, outlet and core list, so only the manifold decides.

What maximum speed applies to G45 cores?

Garrett publishes 100,000 rpm for the G45-1500 and GXR45-76, -80 and -82, 102,500 rpm for the G45-1600, 109,000 rpm for the GXR45-67 and -73, 114,000 rpm for the G45-1475 and 120,000 rpm for the G45-1610. Exceeding it is at the risk of the owner.

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Description

Garrett G45 Turbine Housing Kit, 1.28 A/R T4 Divided Inlet V-Band Outlet

Garrett’s G45 Turbine Housing Kit in 1.28 A/R suits twin-scroll G45 builds on larger engines, with a divided T4 inlet, a V-band outlet and a free-float layout in stainless steel. Garrett lists it for the G45-1475, G45-1500, G45-1600, G-Series II G45-1610 and the five GXR45 cores. This size gives a 5.0L to 7.0L engine room to make power at high rpm while keeping boost onset ahead of the 1.44. On a small engine or a street build that rarely revs out, it will feel slow to respond, and the 1.01 or 1.15 is the better match.

Features

Divided T4 inlet and V-band outlet
External wastegate design with no internal flapper
Third of four A/R sizes in the G45 Turbine Housing Kit lineup

Specifications

Garrett part number: 757707-0025
A/R: 1.28
Turbine inlet and outlet: T4 divided and V-band
Divided inlet: Yes
Wastegate: External (free float)
Rotation: Standard
Material: Stainless steel
Matching turbine wheel: 89mm inducer and 82mm exducer

Applications

Garrett pairs this G45 Turbine Housing Kit with these super cores:

Garrett G45-1475: 888169-5007S super core
Garrett G45-1500: 888169-5005S super core
Garrett G45-1600: 888169-5006S super core
Garrett G45-1610 G-Series II: 938339-5004S super core, 938338-5004S CHRA
Garrett GXR45-67 G-XRace: 934173-5003S super core
Garrett GXR45-73 G-XRace: 934173-5004S super core
Garrett GXR45-76 G-XRace: 952766-5001S super core
Garrett GXR45-80 G-XRace: 952766-5004S super core
Garrett GXR45-82 G-XRace: 952766-5005S super core

Notes

An external wastegate is required, because this housing has no internal wastegate
The G45 or GXR45 super core is sold separately
Garrett publishes a maximum turbocharger speed for each core, from 100,000 rpm on the G45-1500, GXR45-76, GXR45-80 and GXR45-82 to 120,000 rpm on the G-Series II G45-1610; running above it is at the owner’s risk
Garrett also offers 1.01, 1.15 and 1.44 A/R and V-band inlet versions
Garrett does not publish a hardware list for this kit; confirm clamps and gaskets before ordering

Frequently Asked Questions

Does the 1.28 A/R G45 Turbine Housing Kit suit a 6.0L V8? Usually, yes. The 1.28 A/R G45 Turbine Housing Kit flows more than the 1.01 and 1.15 sizes, which suits larger engines in the 2.0L to 8.0L range Garrett gives for G45 cores. The 1.44 goes further still for engines that live at high rpm.
Which G45 cores have the largest compressors? The GXR45-82 with an 82.9mm inducer, the GXR45-80 at 80.9mm and the G45-1600 at 80mm. Garrett rates them at up to 1800, 1750 and 1600 horsepower respectively, and they benefit most from a larger housing like this one, because their compressors move enough air to keep a big turbine housing busy.
Is the housing different for G-Series and G-Series II cores? No. Garrett states that G-Series II uses the first-generation compressor and turbine housings, so the G45-1610 shares this housing with the G45-1475, G45-1500 and G45-1600. A Gen I owner can fit the G-Series II CHRA, 938338-5004S, and keep the housing.
Do I need a twin-scroll manifold? Yes. This version has a divided T4 inlet and needs a manifold ending in a matching divided T4 flange. A single V-band collector pairs with the 1.28 A/R V-band inlet housing, Garrett part 757707-0021. The two share the A/R, outlet and core list, so only the manifold decides.
What maximum speed applies to G45 cores? Garrett publishes 100,000 rpm for the G45-1500 and GXR45-76, -80 and -82, 102,500 rpm for the G45-1600, 109,000 rpm for the GXR45-67 and -73, 114,000 rpm for the G45-1475 and 120,000 rpm for the G45-1610. Exceeding it is at the risk of the owner.

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 G45 Turbine Housing Kit, 1.28 A/R T4 Divided Inlet V-Band Outlet [757707-0025]

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Garrett G45 Turbine Housing Kit, 1.28 A/R T4 Divided Inlet V-Band Outlet

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews