Pro Xe K04-064XXL Audi S3 TT 2.0t Hybrid Turbo Upgrade

PRO XE STAGE 2 HYBRID TURBO

The Pro Xe Stage 2 Hybrid Turbo represents the highest-performance K04-064 hybrid turbocharger in the Pro Xe lineup, engineered for enthusiasts who demand maximum performance while retaining the factory K04 footprint.

Designed around an entirely revised rotating assembly, the Stage 2 is built to deliver substantially greater airflow, improved high-RPM efficiency, and significantly higher horsepower potential than conventional K04 hybrids. By upgrading both the compressor and turbine assemblies while extensively reworking the factory housings, the Stage 2 unlocks the maximum performance available from the K04-064 platform.

Unlike many hybrid turbochargers that focus solely on compressor size, the Pro Xe Stage 2 addresses both sides of the turbocharger. Increased compressor flow is only beneficial when the turbine can efficiently process the additional exhaust volume. By combining a larger compressor with a larger clipped turbine and extensive turbine housing modifications, the Stage 2 maintains efficiency deeper into the RPM range while reducing exhaust restriction and drive pressure.

HOW IS IT UPGRADED?

Every Stage 2 Hybrid Turbo is completely disassembled, inspected, machined, and rebuilt using upgraded OEM-quality components.

Each unit features:

• Fully machined and aggressively ported compressor housing
• Fully machined and aggressively ported turbine housing
• Enlarged turbine volute and throat area
• Maximum wastegate and outlet porting
• Oversized 9-blade extended tip billet compressor wheel
• Oversized clipped 9-blade cutback turbine wheel
• Upgraded journal-bearing CHRA components
• OEM electronic wastegate calibration and setup
• New bearings, seals, and hardware throughout

The oversized extended tip billet compressor significantly increases airflow while maintaining excellent compressor efficiency across a broad operating range. The larger clipped 9-blade cutback turbine processes greater exhaust volume with reduced restriction, helping lower drive pressure and allowing the turbocharger to sustain airflow well into the upper RPM range.

Every turbocharger is high-speed VSR balanced to 150,000 RPM and thoroughly tested prior to shipment.

TURBOCHARGER SPECIFICATIONS

Compressor Wheel

• Oversized 9-Blade Extended Tip Billet Compressor
• Material: 7075-T6 Billet Aluminum

Turbine Wheel

• Oversized Clipped 9-Blade Cutback Turbine
• Material: High-Temperature Nickel-Chromium Superalloy

Housing Modifications

• Fully Ported Compressor Housing
• Aggressively Ported Turbine Housing
• Enlarged Turbine Volute
• Enlarged Turbine Throat
• Maximum Wastegate Porting
• Maximum Outlet Porting
• Optimized Internal Flow Paths

INCLUDED COMPONENTS

• Fully Assembled Hybrid Turbocharger
• Electronic Wastegate Calibrated and Installed

FLOW CAPABILITY

• Approximately 52-54 lb/min
• Efficient Operating Range: 24-34 PSI

POWER POTENTIAL

Supporting modifications and ECU calibration dependent.

93 Octane

• 500+ BHP

Ethanol Blends

• 560+ BHP

RECOMMENDED SUPPORTING MODIFICATIONS

• Custom ECU Calibration
• High-Pressure Fuel Pump Upgrade
• Low-Pressure Fuel Pump Upgrade
• High-Flow Intercooler
• High-Flow Intake System
• 3.5” Intake Recommended
• High-Flow Downpipe
• Performance Charge Pipes
• DSG Tune or Performance Clutch (Manual)

COMPATIBILITY

The Pro Xe K04 Hybrid Turbo is designed around the BorgWarner K04-064 platform and is compatible with both factory K04-equipped vehicles and many K03-equipped EA113 applications when installed with the appropriate supporting hardware and ECU calibration.

Factory K04-064 Applications (Direct Replacement)

Audi

• S3 8P (2.0 TFSI EA113)
• TTS 8J (2.0 TFSI EA113)

Volkswagen

• Golf R Mk6 (2.0 TSI EA113)
• Scirocco R
• Golf GTI Edition 30
• Golf GTI Pirelli Edition

SEAT

• Leon Cupra
• Leon Cupra R

K03 to K04 Upgrade Applications

The Pro Xe K04 Hybrid is also compatible with many EA113 vehicles originally equipped with a K03 turbocharger when paired with the appropriate K04 conversion hardware, fueling upgrades, and ECU calibration. 

Audi

• A3 8P 2.0T FSI
• TT 8J 2.0T FSI
• A4 B7 2.0T FSI (Longitudinal version requires the appropriate longitudinal K04 configuration)

Volkswagen

• Golf GTI Mk5 (EA113)
• Jetta GLI Mk5
• Eos 2.0T
• Passat B6 2.0T

Notes

• Direct bolt-on replacement for factory K04-064 equipped vehicles.
• K03-equipped vehicles require supporting conversion components and custom ECU calibration.
• If you are unsure of your vehicle’s turbocharger or engine code, contact Pro Xe Automotive prior to ordering and we will verify compatibility.

CORE INSPECTION POLICY

Customers wishing to have their existing turbocharger rebuilt or upgraded must contact Pro Xe Automotive before placing an order.

All customer-supplied turbochargers are inspected prior to approval for rebuilding or upgrading. This ensures the housings and core components meet our standards for restoration, reliability, and performance use.

For customers purchasing a hybrid turbocharger and returning their original core afterward, the same inspection procedure applies. Once approved, the applicable core refund will be issued.

WARRANTY

18 Month Warranty

Coverage Includes

• Turbocharger assembly defects
• CHRA defects
• Internal balancing and machining workmanship

Warranty Exclusions

• Improper installation
• Oil starvation or contamination
• Foreign object damage
• Improper tuning
• Overspeed or overboost conditions
• Third-party modifications or repairs

If a warrantable defect is confirmed, Pro Xe Automotive will repair or replace the turbocharger at our discretion.

LEAD TIME

Typical production time is approximately 7-8 business days. Contact Pro Xe Automotive for current production lead times.