MuchBoost S63B44T hybrid turbo set, BMW M5 F90 (850–920 hp)

MuchBoost S63B44T hybrid turbo set, BMW M5 F90, 850–920 hp

A bolt-on MuchBoost hybrid turbo set for applications including BMW M5 F90, BMW M5 F90 Competition. This upgrade is built for S63B44T applications and retains a clean, vehicle-specific installation.

The turbo is based on original Garrett housings. The upgraded compressor and higher-flow turbine sides provide considerably more capacity than the factory unit, while the housings are precision-machined for the new internals.

Depending on the selected version, the manufacturer rates the turbo for approximately 850–920 hp. Final output depends on engine condition, the fuel system, intake, exhaust, cooling and, above all, the ECU calibration.

An upgraded turbo always requires vehicle-specific ECU calibration.

Futurez imports MuchBoost turbochargers and works with the manufacturer in Finland. You get secure delivery from a Finnish seller, a wide choice of payment methods and help selecting the correct turbo version. Every purchase also earns F* Bonus points.

Versions and technical differences

850 hp version

This version is built for approximately 850 hp, with upgraded internals sized for this output level.

• Manufacturer-rated power potential approximately 850 hp
• Upgraded billet compressor wheel
• Larger high-flow turbine wheel
• Clipped turbine wheel helps reduce exhaust backpressure
• Reinforced journal bearing system for higher boost
• Precision-machined compressor housing and seal plate
• Turbo core is high-speed VSR balanced

920 hp version

This version is built for approximately 920 hp, with upgraded internals sized for this output level.

• Manufacturer-rated power potential approximately 920 hp
• Upgraded billet compressor wheel
• Larger high-flow 9-blade turbine wheel
• Precision-machined turbine housing

Common to all versions

• Original Garrett housings and actuator
• Compressor and turbine wheels are balanced separately, followed by high-speed VSR balancing of the complete core
• Required gasket set is included
• Bolt-on fit in place of the original turbos

Upgrade service or a complete new turbo?

You can order the turbo either by sending your original unit to us as the build core or by choosing a complete, newly built turbo.

Send my original turbo: The serviceable original housings are used to build the new hybrid turbo. After ordering, we will email the return instructions so the turbo can be sent through us for the upgrade. The work and delivery normally take around 2–3 weeks from the time the turbo arrives for inspection. The supplied unit must be original and its housings must be serviceable.

Complete new turbo: You receive a complete, ready-built hybrid turbo. Your original unit does not need to be sent in, so it can be retained or sold separately.

Read more about the core exchange process and shipping instructions.

Examples of compatible vehicle applications

• BMW M5 F90 600HP (MY 1985–2026)
• BMW M5 F90 Competition 625HP (MY 1985–2026)
• BMW M8 F91/F92/F93/G14/G15/G16 591HP
• BMW M8 F91 Competition 617HP (MY 2019–2026)

Engine codes

S63B44T

Related OE and turbo numbers

841902-5012S
841902-5008S
841902-0012
841902-0008
841901-5008S
841901-0008
11657852373
11658070601
11657852372
11658070599

Before ordering, check the engine code and the identification numbers on the original turbo. If you are unsure about fitment, contact us with the VIN and the old turbo numbers and we will help verify the correct version.

Tip: Ask us for the gaskets, bolts, oil lines and other installation parts at the same time. A new turbo should not be installed with a restricted oil feed or leaking gaskets.

MuchBoost turbochargers carry a 12-month manufacturer warranty covering manufacturing and material defects. The warranty does not cover failures caused by external factors such as lubrication problems, unsuitable engine calibration or installation errors.