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MuchBoost B14XFT Upgraded Turbocharger with a Custom Billet Compressor Wheel 8+0 Blades. It is based on an original MHI Turbocharger, which means that the installation is 100%P&P. The turbocharger is meant to work with Opel Astra K, Insignia B 1.5T, MokkaX, Chevrolet Cruze II, and Malibu 1.5T with the B14XFT 1.4T and 1.5T 150-163HP engines.

The turbo delivers up to 166% power (100 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.

We have developed 2 modification options that allow you to reach anywhere from 220HP to 250HP.

MuchBoost B14FXT 220

Upgraded turbocharger with an estimated potential of ~220HP at the crank. The list of modifications:

  • Fast spool thanks to enlarged Billet Compressor Wheel,
  • Clipped and Lightened Genuine Turbine Wheel,
  • High air-fuel ratio including high peak torque achieved at low engine speeds.
  • Genuine MHI compressor housing,
  • Genuine MHI exhaust manifold,
  • Genuine MHI bearing housing,
  • Original MHI actuator,
  • Precisely machined compressor housing and 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 B14XFT 250

Upgraded turbocharger with an estimated potential of ~250HP at the crank. Modifications compared to the 220 option are the same except:

  • Larger Turbine Wheel,
  • Machined exhaust housing.
Other significant modifications

The turbo is meant to work with ~220-250HP 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 the turbo!

Opel Astra K 1.4T 150HP
Chevrolet Cruze II 1.4T 150HP
Opel Insignia B 1.5T – 165HP
Chevrolet Malibu 1.5T – 163HP
Opel Mokka X 1.4T – 152HP

Factory numbers



B14 XFL,
B14 XFT,
D14 XFT,

OEM number

A3946 BM70

(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.



220HP, 250HP

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