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MuchBoost M139 Upgraded Turbocharger with a Custom Billet Compressor Wheel 6+6 Blades. It is based on an original KKK Turbocharger, which means that the installation is 100%P&P. The turbocharger is meant to work with Mercedes A45, CLA45, GLA45 with the M139  386-421HP engines.

The turbo delivers up to 142% power (166 extra HP) over the factory specs. It is a great choice for someone looking for a bit extra HP from their daily driver. MuchBoost turbo allows you to get more from your engine and enjoy it even more than you’ve been so far.

Main Features
  • The potential +550HP,
  • Fast spool thanks to Custom Billet Compressor Wheel,
  • Genuine KKK Turbine Wheel,
  • High air-fuel ratio including high peak torque achieved at low engine speeds.
Details on the construction of the turbo:
  • Genuine KKK compressor housing,
  • Genuine KKK exhaust manifold,
  • Genuine KKK bearing housing,
  • Original KKK actuator,
  • Upgraded Journal bearing system that allows holding more boost,
  • The compressor and turbine wheels are balanced separately, and then the whole core is high-speed balanced using VSR balancing machines at speeds similar to the level seen in the vehicle.
Other significant modifications

The turbo is meant to work with +550HP In order to reach that level of power, you need to adjust your fuel, exhaust, and cooling systems as well.

Example project

One of our clients managed to produce 521HP and 665Nm of torque with our turbo and other modifications. List of mods:

  • Modified intake,
  • Modified Downpipe,
  • MuchBoost Turbo,
  • EST ECU software,
  • CPC Solution.

Dyno graph below:

Another great project from Australia with an A45s W177 that managed to produce 449HP and 564Nm of torque at the wheels. The car was equipped with:

  • Dyne Performance & Evotech Melbourne downpipe,
  • PSM Armaspeed Europe carbon cold air intake,
  • Evotech Motorsport remap.

You can see the video of the project on our FB page here:


A set of gaskets is included with every option you choose!

Mercedes A45 W177 386HP
Mercedes CLA45 C118 386HP
Mercedes GLA45 H247 386HP
Mercedes A45S W177 421HP
Mercedes CLA45S C118 421HP
Mercedes GLA45S H247 421HP

Factory numbers




OEM number


(If your engine has a different code, please send us a message. We will verify it.)

Matters you should be aware of when placing your order.
    1. The warranty is 12 months without the limit of mileage.
    2. We need about 7 working days to perform and ship the upgraded turbocharger. The parcels in European Union are shipped via DPD for just 25,00 EURO. DHL Express (airplane shipping)  is used for orders besides the EU, it costs 99,00 EURO. The average delivery time is 2-4 working days. 
    3. Every parcel is fully insured.
    4. If you didn`t find the turbo you need, feel free to contact us. We are able to perform many more upgraded turbochargers than you can find on the site. Our development department works permanently on the new models.
    5. Do you have a workshop, are you an influencer or seller of tuning parts? We are open to cooperation by offering discounts and refunds.
    6. During placing your order, please provide information as follows:
    • the engine code,
    • the car model,
    • the stock power,
    • the VIN number

These details are helpful to make the turbo correctly.

* Just upgrade option means that we will modify your turbochargers once you sent them to us. The turbo can’t be cracked and must be genuine.

Complete turbo option is for those who want to buy a fully built turbo ready to install in the car.



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