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Mercedes-Benz

W.3 Turbo Upgrade, M178
Purchase W.3 Turbo Upgrade, M178
  • SKU: 01-178-01609-3

    W.3 Turbo Upgrade, M178

  • Gains are at the engine or "crank". Actual gains are dependent on the model, model year, fuel octane, engine health, and environmental conditions. Learn More

  • $4,999.99

  • 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 765
Weistec Torque 683
Turbo Type W.3 (Factory Upgrade)
Manufacturer Weistec
Street legal in all the US States No
Engine Family M178
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year make model trim engine
2020 Mercedes-Benz AMG GT R Base (C190) Twin Turbo 4L V8 (M178)
2019 Mercedes-Benz AMG GT R Base (C190) Twin Turbo 4L V8 (M178)
2018 Mercedes-Benz AMG GT R Base (C190) Twin Turbo 4L V8 (M178)
2017 Mercedes-Benz AMG GT R Base (C190) Twin Turbo 4L V8 (M178)
2020 Mercedes-Benz AMG GT C Base (C190) Twin Turbo 4L V8 (M178)
2019 Mercedes-Benz AMG GT C Base (C190) Twin Turbo 4L V8 (M178)
See more
AMG GT, GTS, GTR Models

The Weistec M178 W.3 Turbo Upgrade unlocks the true potential of the 4.0L Biturbo engine.  Power gains are substantial, especially in the top end.

The factory turbocharges are disassembled and fully inspected.  The compressor cover and center cartridge are then machined to accept our 5-axis CNC machined 65mm impeller wheel.  Externally, no changes are made to maintain a completely stock appearance.  The new impeller wheel supports greater power levels than the factory unit with little to no sacrifice in spool and response.  The turbochargers are then reassembled with new seals and fully balanced for smooth operation and OEM service life.  All the original oil and coolant lines bolt right up making for a simple install.

For maximum results, the combination of our Weistec Downpipes, and Weistec High Flow Air Filters is recommended.  A Weistec W.3 Turbo Specific ECU Upgrade is recommened.

Weistec W.3 Power Package AMG GT-S


Key Features:


  • Signifigant Horsepower Increase

  • 5 Axis CNC Machined

  • High RPM Balanced for perfect operation

  • Substantial power throughout the RPM range

  • Rev Limit increased to 7500 RPM (on compatible models with tuning)

  • Stock Appearance when installed

  • 100% Bolt on installation

  • All necessary hardware and gaskets are included