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ENGINEERING THE FUTURE OF PERFORMANCE ™
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Audi W.3 Turbo Upgrade, RS7/S8 4.0 TFSI
    Audi W.3 Turbo Upgrade, RS7/S8 4.0 TFSI
    Purchase Audi W.3 Turbo Upgrade, RS7/S8 4.0 TFSI
    • SKU: 01-408-02167-9

      Audi W.3 Turbo Upgrade, RS7/S8 4.0 TFSI

    • Power gain Up To

      +166 HP

      Torque gain Up To

      +175 TQ

      Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

      Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

      Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

      Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

      Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

      Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

      Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

      Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.

    • $3,299.00 $3,299.00

    • Prop 65 warning
      Warning

      This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
    Weistec Horsepower 726
    Weistec Torque 691
    Turbo Type W.3 (Factory Upgrade)
    Manufacturer Weistec
    Street legal in all the US States No
    Engine Family 4.0L TFSI
    See more
    year make model trim engine
    2026 Audi RS7 Sportback Performance (C8) Twin Turbo 4L V8 (EA825)
    2025 Audi RS7 Sportback Performance (C8) Twin Turbo 4L V8 (EA825)
    2024 Audi RS7 Sportback Performance (C8) Twin Turbo 4L V8 (EA825)
    2023 Audi RS7 Sportback Performance (C8) Twin Turbo 4L V8 (EA825)
    2022 Audi RS7 Sportback Performance (C8) Twin Turbo 4L V8 (EA825)
    2018 Audi RS7 Sportback Performance (C7) Twin Turbo 4L V8 (EA825)
    See more

    Product Description


    How does the Weistec W.3 Turbo Upgrade Work?

    The factory turbochargers are disassembled and fully inspected. The compressor cover and center cartridge are then machined to accept our 5-axis CNC-machined impeller wheel. Externally, no changes are made, preserving a completely stock appearance. The new impeller wheel supports greater power levels than the factory unit with little to no sacrifice in spool or response. The turbochargers are then reassembled with new seals and fully balanced for smooth operation and OEM service life. All original oil and coolant lines bolt right up, making for a simple install.

    Audi RS7 S8 4.0 TSFI W.3 Turbo Upgrade
    turbines

    Audi RS7/S8 TFSI W.3 Turbo Upgrade

    OEM appearance and reliability make the W.3 upgrade an easy decision. We have developed proprietary aerodynamics designed to optimize extreme pressure operation of the RS7/S8 TFSI. The results are astonishing, with gains of up to 800 wheel horsepower.



    Key Feature

    • 5 Axis CNC Machined
    • High RPM Balanced for perfection operation
    • 100% Bolt on installtion
    YouTube video player - Weistec Engineering W.3 Turbo Upgrades

    Good to Know

    • This is a rebuild of your original factory turbochargers, not a set of brand-new units.
    • Your turbochargers must be sent to us to complete this upgrade.
    • Please include your wastegate actuators along with your turbos, this allows us to test and set the gate preload during the process.
    • Once your turbos are received, they're fully inspected for damage on any of the reused components. If a built core is in stock, it will be sent back to you immediately. If a core is not in stock, your exact unit will be rebuilt, which can take up to 2 weeks depending on timing.
    • Power gains vary by vehicle, modifications, fuel, and operating conditions (ambient temperature, altitude, etc.).
    • Custom tuning is required for best results.

    See the full core exchange process →