Toyota Supra MK5 BMW Z4 M40i MPS GR700 700PS upgrade turbo
700PS (approx. 690 HP) on the B58 engine platform (MK5 Supra / Z4 M40i) is the “sweet spot” for many enthusiasts. It significantly increases performance while remaining manageable on the stock engine internals.
The MPS GR700 specifically refers to a Stage 2 Hybrid Turbo upgrade popular in Europe (particularly Germany). It is designed as a bolt-on solution that retains the factory turbo housing but replaces the internals with high-flow components.
MPS GR700 Turbo Specifications
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Hybrid Design: Re-manufactured OEM BorgWarner housing with enlarged, CNC-machined internals.
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Compressor Wheel: Upgraded billet compressor wheel with an optimized “S-blade” or 7+7 blade geometry for increased airflow.
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Turbine Wheel: Larger 9-blade high-flow turbine wheel to reduce backpressure at high RPM.
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Bearing System: Reinforced thrust bearings to handle the increased boost pressures (often 28–32 psi) required to hit 700PS.
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Spool Characteristic: Maintains near-factory spool times, providing a very broad and linear power band compared to “Big Turbo” full-frame kits.
Supporting Modifications for 700PS
To reach and sustain 700PS reliably, the turbo is only one part of the equation. You will typically need:
| Category | Requirement | Recommendation |
| Fueling | High-Pressure Fuel Pump (HPFP) | Dorch Stage 2 or Visconti/Spool Performance FX-180. |
| Intake | High-Flow Inlet & Filter | 3.5″ or 4″ intake pipe (e.g., MST or Eventuri). |
| Exhaust | High-Flow Downpipe | Catless or 200-cell sports cat (Supersprint or Akrapovič). |
| Cooling | Upgraded Heat Exchanger | CSF or AMS Performance front-mount heat exchanger. |
| Tuning | Custom ECU Map | MHD or Bootmod3 with a custom tune (e.g., PureBoost or PederTuned). |
Transmission Considerations (ZF 8HP51)
At 700PS, the torque output will exceed 800–850 Nm. While the ZF8 is strong, you should consider:
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xHP Flashtool (Stage 3): Essential for increasing line pressure to prevent clutch slip in the higher gears.
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Transmission Cooler: Recommended if you plan on doing multiple back-to-back pulls or track days.
Market Alternatives
If you are still weighing your options, these are the primary competitors in the “700PS Hybrid” class:
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Pure 800 (Cast): One of the most popular global options; very reliable with excellent customer support.
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TurboSystems Stage 2: Highly popular in Europe; known for a very aggressive mid-range punch.
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TTE777 (The Turbo Engineers): Often considered the “premium” hybrid option, capable of pushing slightly past 700PS with race fuel or Ethanol.
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