Garrett G38/GXR38 Turbine Housing Kit O/V V-Band / V-Band 0.85 A/R

V-Band Inlet and Outlet Turbine Housing for G38 Platform Builds

The Garrett G38/GXR38 Turbine Housing Kit O/V V-Band / V-Band 0.85 A/R (GRT757707-0037) provides a fully V-Band inlet and outlet turbine housing solution for G38-1000 and GXR38-64 supercores in builds utilizing V-Band exhaust manifolds for simplified, leak-free exhaust connections and easy turbo removal. The 0.85 A/R ratio on GRT757707-0037 delivers the quickest spool response in the V-Band inlet G38 housing family, making it the first choice for builds on 2.0L to 3.5L engines where throttle response and mid-range torque are the primary objectives. The V-Band inlet also facilitates easy turbo rotation for optimal oil drain positioning and simplified manifold clearance in tight engine bays.

Key Features

• GRT757707-0037 V-Band inlet / V-Band outlet turbine housing for G38 and GXR38 supercores
• 0.85 A/R provides fastest spool in the V-Band G38 housing family for responsive builds
• Dual V-Band connections for leak-free exhaust sealing and easy turbo removal for service
• Stainless steel construction rated for sustained high-temperature race and street use
• External wastegate only for full boost pressure control
• Allows turbo rotation for optimized oil drain line routing in tight installations
• Includes gasket kit, V-Band clamps, and mounting hardware

Specifications

What’s Included

• 1 x GRT757707-0037 G38/GXR38 Turbine Housing Kit
• Gasket kit
• V-Band clamps for inlet and outlet
• Mounting hardware
• Note: Supercore sold separately

About Garrett Motion

Garrett Motion produces the G38 turbine housing family in both T4 divided and V-Band inlet configurations across three A/R ratios, giving builders maximum flexibility to match the housing to their manifold design and performance objectives. The V-Band inlet versions are preferred in competition builds and high-end street cars utilizing custom V-Band exhaust manifolds.

FAQ

The GRT757707-0037 is a Garrett G38/GXR38 turbine housing featuring a V-Band inlet and V-Band outlet with a 0.85 A/R ratio. It is the quickest-spool V-Band inlet option in the G38 housing family and is sold as a standalone kit requiring a compatible G38 or GXR38 supercore to complete the turbocharger assembly.

A V-Band inlet allows full turbo rotation for flexible oil drain positioning, provides an easier manifold connection with fewer fasteners, and gives better manifold clearance in tight engine bays. However, V-Band inlets are typically undivided (single scroll), so they do not preserve exhaust pulse energy in the same way a divided T4 manifold does.

GRT757707-0037 fits the G38-1000 supercore (938272-5003S) and the G-XRace GXR38-64 supercores (934173-5008S and 934173-5009S). It is not compatible with G40, G42, or other frame supercores.

Yes. All G38 turbine housing kits are externally wastegated. An external wastegate must be sourced and installed separately.

The 0.85 A/R V-Band housing is optimized for 2.0L to 3.5L builds targeting strong mid-range power and quick spool. Larger displacement builds or those targeting peak power above 800 horsepower should consider the 0.95 or 1.06 A/R options.

Yes. GRT757707-0037 includes V-Band clamps for both the turbine inlet and turbine outlet connections, along with the gasket kit and mounting hardware.

Yes. A key advantage of the V-Band inlet configuration is that the turbocharger can be rotated relative to the manifold connection for optimal oil drain positioning, which is not possible with fixed T4 flanged housings.

GRT757707-0037 is a single-scroll (open/undivided) V-Band inlet housing. For twin-scroll exhaust pulse energy retention, use the T4 divided inlet versions GRT757707-0042, 0043, or 0044.

Installation Overview

1. Verify the G38 or GXR38 supercore is assembled with oil and coolant fittings installed
2. Align the V-Band turbine inlet to your V-Band exhaust manifold outlet and clamp using the included V-Band inlet clamp
3. Rotate the turbo assembly to the optimal position for oil drain routing before fully tightening the inlet V-Band clamp
4. Connect the V-Band turbine outlet to the downpipe using the included outlet V-Band clamp
5. Install external wastegate to manifold dump port
6. Prime oil system before first start and bleed coolant circuit
7. Allow idle break-in before operation under boost