Mosselman MSL62-75 Stage 2 S55 Hybrid Twin Turbocharger Upgrade Kit | BMW M2 Competition, M3, M4 (F87 F80 F82/F83 F8X) | Direct-Fit OEM MHI Biturbo Replacement | Bolt-On Plug & Play | Up to 800hp

S55 bi-turbo direct-fit performance upgrade for BMW F8x M cars

Ready to unlock serious power on the S55B30 while keeping OEM manners and reliability? This high-flow hybrid bi-turbo set is engineered from brand new Mitsubishi Heavy Industries units with in-house upgrades for exceptional airflow, strong midrange punch and repeatable track-day durability. With the correct calibration, fuel quality and supporting hardware, 800 bhp potential is achievable while retaining stock-location installation and factory-like refinement.

We have fitted this upgrade on customer F8x builds in the UK and feedback has been superb for response, consistency and day-to-day drivability. If your goal is a fast-road or circuit-ready M2 Competition, M3 or M4, this is the bolt-on twin turbo solution we recommend.

Key reasons enthusiasts choose this S55 hybrid set

• Headroom for around 800 bhp with the right tune, fuel and supporting mods
• Built from brand new MHI base units for OE-grade reliability and fitment
• Billet aluminium compressor wheels for high efficiency and low shaft inertia
• Latest enlarged turbine wheel with slim hub for reduced drive pressure and flow
• Precision CNC-machined housings for tight clearances and durability
• VSR balanced for smooth high RPM operation and longevity
• Lightweight titanium shaft nut to aid spool
• Assembled and upgraded in the Netherlands by the manufacturer
• Direct-fit, stock-location install to factory oil and coolant lines and hardware
• Limited 1-year warranty
• Core exchange option available after inspection and approval

Because the upgrade uses new OE-based cartridges and housings, installation is straightforward and keeps the integrity of the original layout. Expect rapid spool, a fatter torque band, and the airflow needed for high horsepower S55 builds without compromising daily usability.

Vehicle applications

• BMW M2 Competition F87 with S55
• BMW M3 F80, including Competition and CS
• BMW M4 F82 and F83, including Competition, CS and GTS

What you will need to complete the install

We recommend fresh ancillaries during turbo replacement:

• Genuine BMW S55 turbo fitting kit for F80 F82 F87
• Genuine BMW S55 coolant feed and return line set where required
• Genuine BMW S55 service kit items
• 2 x Castrol Edge 5W-30 M fully synthetic engine oil
• 4 x Genuine BMW antifreeze and coolant 1.5 L
• 8 x De-ionised water 1 L

Core charge and warranty

A refundable core charge is available and is returned after inspection and approval by the manufacturer. The turbo set carries a limited 1-year warranty.

Fitting and calibration

Professional installation and ECU calibration are recommended. MJ Modifications in Warwickshire offers full fitting and tuning support for S55 builds. For a fitting quote or advice on the correct supporting hardware, email info@mjmodifications.co.uk.

Part number

TUS55.6580

Manufactured by

Mosselman

Compatibility check

We will verify fitment before dispatch. For UK vehicles, provide your registration number. For international orders, supply the last 7 digits of your VIN at checkout.

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