• Stage 1 turbo upgrade for Mercedes-AMG GT R190 M178 4.0L BiTurbo using OEM BorgWarner-based housings
  • Upgraded Stage 1 turbo internals including billet compressor and turbine components for Mercedes-AMG GT M178
  • Dyno chart showing horsepower and torque gains from the Stage 1 turbo upgrade on a 4.0L V8 BiTurbo AMG
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Stage 1 Turbo Upgrade for Mercedes AMG GT / GT S / GT C / GT R (R190) – M178 4.0L BiTurbo

Stage 1 Turbo Upgrade for Mercedes AMG GT / GT S / GT C / GT R (R190) – M178 4.0L BiTurbo

$3,495.00 USD
$3,495.00 USD
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Shipping calculated at checkout.
Core Option

Stage 1 Turbo Upgrade — Mercedes-AMG GT / GT S / GT C / GT R

R190 · M178 4.0L V8 BiTurbo • OEM BorgWarner rebuild • Stock-like drivability

The Stage 1 Turbo Upgrade for the Mercedes-AMG GT (R190) is built for owners who want a serious jump in power without giving up reliability or daily drivability. Built on OEM BorgWarner rebuild kits, it delivers substantial wheel horsepower and torque gains while keeping factory-like response.

This is not an oversized race turbo or an experimental setup. It is a refined, proven Stage 1 solution for the M178 4.0L V8 BiTurbo — ideal for aggressive street cars, tuned weekend GTs, and owners building toward more later.

Core Deposit: a core deposit is required for your stock turbochargers unless you send your factory turbos in advance. Sending cores in advance is the lower price — choose the option that suits you above.

Key Benefits

  • Significant wheel horsepower and torque gains over the factory turbos
  • OEM BorgWarner internals for long-term reliability
  • Improved airflow and boost efficiency without extreme lag
  • Retains the AMG GT's factory character and drivability

Vehicle Fitment

  • Mercedes-AMG GT (R190) — M178 4.0L V8 BiTurbo
  • Mercedes-AMG GT S (R190) — M178 4.0L V8 BiTurbo
  • Mercedes-AMG GT C (R190) — M178 4.0L V8 BiTurbo
  • Mercedes-AMG GT R (R190) — M178 4.0L V8 BiTurbo
Important Wastegate Notice:
If your turbochargers arrive with wastegates fitted, do not use the supplied wastegate units — their condition and calibration are not guaranteed. Reuse your factory wastegates for known, reliable operation.

What These Turbos Need

Tuning is required; the factory calibration has no strategy for these turbos. The rest controls heat and airflow so the turbos deliver what they are capable of.

Core Return

  • Core return required — remove your factory wastegate actuators before shipping
  • The core deposit is fully refunded once acceptable cores are received

Need help planning supporting mods? Send us power target and we will map the build before you order.

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