Garrett G38/GXR38 Turbine Housing Kit Div T4 / V-Band 1.06 A/R

Garrett G38/GXR38 Turbine Housing | Divided T4 1.06 A/R

Upgrade your G38 or GXR38 supercore with this Garrett Stainless Steel Turbine Housing. Features: Divided T4 inlet, V-Band outlet, and high-flow 1.06 A/R

The Garrett G38/GXR38 Turbine Housing Kit (Divided T4 Inlet / V-Band Outlet, 1.06 A/R) is a high-capacity, high-flow stainless steel exhaust housing engineered specifically for Garrett G-Series G38-1000, GXR38-64, and GXR38-68 supercores. Designed for high-displacement engines and extreme-horsepower drag-racing or track setups, this housing maximises top-end exhaust flow while maintaining twin-scroll pulse-scavenging capabilities.

Investment-cast from high-grade stainless steel, this turbine housing is rated to withstand severe exhaust gas temperatures (EGTs) up to 1050°C (1922°F) without warping, cracking, or corroding. The 1.06 A/R ratio represents the largest A/R option in the G38/GXR38 lineup, making it the ultimate choice for reducing exhaust backpressure and unlocking maximum top-end power output on 1000+ HP engine builds.

Product Details

1. Compatibility: Garrett G-Series G38-1000, GXR38-64, and GXR38-68 Supercores
2. Area over Radius (A/R): 1.06 A/R
3. Turbine Inlet Flange: Divided T4 (Twin-Scroll)
4. Turbine Outlet Flange: V-Band
5. Wastegate Configuration: Free Float (External Wastegate Required)
6. Temperature Rating: Up to 1050°C (1922°F)
7. Material: High-Temperature Investment Cast Stainless Steel
8. Rotation: Standard Rotation

Key Features

1. High-Flow 1.06 A/R Ratio: Large volute capacity designed to minimise exhaust backpressure at high RPM, supporting maximum horsepower potential.
2. Divided T4 Twin-Scroll Inlet: Separates exhaust pulses from alternating cylinders to improve turbine wheel response and low-end spool up.
3. High-Heat Stainless Steel Construction: Cast from specialized stainless steel alloys that withstand extreme thermal cycling up to 1050°C without cracking.
4. 360-Degree V-Band Outlet: Provides a leak-free, gasketless seal to the downpipe for effortless alignment, clocking, and fabrication.
5. CFD-Optimized Internal Volute: Aerodynamically sculpted internal contours optimize exhaust gas velocity as it strikes the 74mm turbine wheel.

Key Benefits

1. Unlocks Maximum Top-End Power: Reduces engine backpressure and pumping losses, allowing modern twin-cam and high-displacement engines to breathe freely at peak RPM.
2. Improved Cylinder Scavenging: Divided T4 geometry prevents exhaust gas pulse crossover, resulting in cleaner cylinder filling and better overall engine efficiency.
3. Corrosion & Warp Resistance: Stainless steel alloy maintains dimensional stability under continuous anti-lag, launch control, and hard track abuse.
4. Simplified Downpipe Fabrication: V-Band discharge flange eliminates rigid bolt patterns and traditional gaskets, ensuring a reliable, easy-to-service connection.
5. Gasketless CHRA Interface: Utilizes a precision V-Band clamp connection between the center housing and turbine housing for easy 360-degree rotation during installation.

Technical Specifications

1. Garrett Part Number Reference: 757707-0039 (or equivalent G38 Divided T4 1.06 A/R kit)
2. Max Thermal Limit: 1050°C
3. Turbine Wheel Compatibility: 74mm Inducer / 66mm Exducer
4. Inclusions: Stainless steel turbine housing, V-Band CHRA clamp, and mounting hardware