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W.3 Turbo Upgrade, BMW S55
Purchase W.3 Turbo Upgrade, BMW S55
  • SKU: 01-555-01859-9

    W.3 Turbo Upgrade, BMW S55

  • 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

  • $3,499.99

  • Prop 65 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

Weistec Horsepower 720
Weistec Torque 750
Turbo Type W.3 (Factory Upgrade)
Manufacturer Weistec
Street legal in all the US States No
Engine Family S55
See more
year make model trim engine
2020 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
2019 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
2018 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
2017 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
2017 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
2016 BMW M4 7AT (F83) Twin Turbo 3L I6 (S55)
See more

The Weistec BMW S55 W.3 Turbo Upgrade unlocks the true potential of the 3.0L Twin Turbo 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 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, a Weistec W.3 Turbo Specific ECU Upgrade is recommended.

Key Features:

  • Signifigant horsepower and torque increases depending on fuel and supporting modifications

  • 5 Axis CNC Machined

  • High RPM Balanced for perfect operation

  • Substantial power throughout the RPM range

  • Stock Appearance when installed

  • 100% Bolt on installation

  • All necessary hardware and gaskets are included