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MuchBoost M278 Upgraded Turbocharger with a Custom Billet Compressor Wheel and Clipped and Lightened/Enlarged Turbine Wheel. It is based on an original Garrett Turbocharger, which means that the installation is 100%P&P. The turbocharger is meant to work with Mercedes S500/550SL500/550, E500/550, CLS500/550, CL500/550, and GLE/M450/500 with the M278 402-435HP engine.

The turbo delivers up to 194% power (372 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.

MuchBoost M278 690

Upgraded turbochargers with an estimated 690HP at the crank. List of modifications:

  • Fast spool thanks to Custom Billet Compressor Wheel,
  • Clipped and Lightened Turbine Wheel,
  • High air-fuel ratio including high peak torque achieved at low engine speeds,
  • Genuine Garrett compressor housing,
  • Genuine Garrett exhaust manifold,
  • Genuine Garrett bearing housing,
  • Original Garrett actuator,
  • Precisely machined compressor housing & seal plate,
  • 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.
MuchBoost M278 780

Upgraded turbochargers with an estimated potential of 780HP at the crank. Modifications compared to the 690 option are the same except:

  • Enlarged 7+7 Blades Billet Compressor Wheel,
  • Larger High-Flow 9 Blades Turbine Wheel,
  • Precisely machined exhaust housing.
Other significant modifications

The turbo is meant to work with ~690-780HP In order to reach that level of power, you need to adjust your fuel, exhaust, and cooling systems as well.

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

Mercedes S500/550 W221/C217 – 435HP
Mercedes SL500/550 R231 – 435HP
Mercedes E500/550 W212 – 402HP
Mercedes CLS500/550 C218 – 402HP
Mercedes CL500/550 C216 – 435HP
Mercedes GLE/M450/500 W166 – 402/423HP

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 set ready to install in the car.


690HP, 780HP



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