(C63 W205, E63 W213, G63 2019+, S63 W222, AMG GT)
The M177/M178 4.0 BiTurbo V8 is one of AMG’s most advanced and capable engines — lightweight, strong, and incredibly responsive to tuning. With its hot-V twin-turbo layout, robust internals and intelligent ECU/TCU systems, the platform delivers huge performance gains safely and reliably when calibrated correctly.
This engine powers AMG’s flagship models, including the C63 (W205), E63 (W213), G63 (W463A 2019+), and the S63 (W222 facelift 2018–2020), as well as AMG GT models and high-performance SUVs such as the GLC63, GLE63 and GLS63.
At Boost Performance, we specialise in custom M177/M178 tuning — from Stage 1 ECU remaps to full hybrid-turbo conversions. Every package is developed and validated on our World-Class Dyno, ensuring maximum accuracy, repeatability and complete safety for both road and track applications.
Stage 1 – 560–600 bhp
STAGE 1 – ECU Remap (No Hardware Required)
Power Gains
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560–600 bhp
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600–650 lbft
Overview
Stage 1 unleashes the true potential of the 4.0 BiTurbo with a fully custom ECU calibration designed to safely increase boost, adjust timing, unlock torque modelling and sharpen throttle response.
Includes
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Fully custom ECU remap
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Dyno session + health check
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Boost, timing & torque model optimisation
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Enhanced throttle response
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Optional TCU gearbox software
Perfect For
Daily-driven C63/E63/G63 models wanting significantly more power with factory hardware.
Stage 1 – ECU Remap
£499 + VAT
£598 inc VAT
Stage 2 – 620–700 bhp
STAGE 2 – ECU + Downpipes (Sports Cats or Decat)
Power Gains
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620–700 bhp
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700–800 lbft
Requirements
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Sports cat downpipes or decat downpipes
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Optional performance air filters/intakes
Includes
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Stage 2 ECU remap
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Revised boost/timing for improved exhaust flow
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Dyno calibration session
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Optional TCU gearbox software
Perfect For
Drivers who want a huge mid-range jump, a stronger top-end and a more aggressive, deeper exhaust tone.
Stage 2
£649 + VAT
£779 inc VAT
Stage 3 – 750–900+ bhp
STAGE 3 – Hybrid Turbos + Full Performance Package
Power Gains
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750–900+ bhp
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850–1000+ lbft (dependent on hardware)
Requirements
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Hybrid turbochargers
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All Stage 2 hardware
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Upgraded intakes
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Larger intercoolers / uprated heat exchanger
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Optional fuel system upgrades
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Optional meth injection system
Includes
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Full Stage 3 ECU calibration
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Boost limit remodelling for hybrid turbos
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Extensive dyno logging & safety monitoring
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Optional high-torque TCU gearbox tune
Perfect For
Serious builds, drag setups and customers chasing supercar or hypercar-level performance. Extremely popular on E63, G63 and AMG GT models.
Stage 3
£899 + VAT (map only – hardware separate)
£1,079 inc VAT