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RENNtech R3 Pkg | C190 | AMG GT | 734 HP / 633 LB-FT | 4.0L V8 BiTurbo | M178 | MY2016-2017

R3 includes: ECU Upgrade, BOV Adapters, High-Flow Air Filters, Stainless Steel Downpipes Fuel System Upgrade and Stage II Turbocharger Upgrade | Gains: +228 HP; +182 LB-FT.
SKU: PKG.190.GT.R3
Retail price without tax: $25,880.00

The Mercedes GT is the second Mercedes Benz vehicle fully developed by AMG, the company’s Affalterbach based performance division and long fabled engine builder. The resulting vehicle is nothing short of spectacular and the 4.0L V8 BiTurbo engine within is an incredible platform to build performance upon. 

RENNtech lightweight forged billet turbo wheels feature a dramatically larger than stock impeller (inlet side) and an increase in the turbine trim (exhaust side). This combination of high quality, light weight components compensates for turbo lag despite being a functionally larger turbo. The cartridge supporting shaft is also both larger and stronger designed to handle the larger wheels and additional power. This entire cartridge is then fine balanced as a complete assembly to compensate for these increases. The impeller and turbine housings are then precision CNC machined and flow tested in-house to fit the larger internal cartridge. The end result is nothing short of spectacular with the RENNtech R3 package gaining up to 228 hp and 182 lb-ft.

More power isn’t the only performance benefit as our turbos spool quicker, offer a more responsive throttle and immediate power delivery thanks to a reduction in exhaust back pressure, rolling resistance, higher RPM's and a lighter rotating mass. In addition, our turbo upgrade kit functions with the OEM oil and coolant lines. This isn’t just an OEM turbo charger with machined internals; but a dramatically larger, more powerful turbocharger that blows away anything else on the market!

RENNtech Downpipes are constructed from 304 High-Strength Stainless Steel and are equipped with 200 Cell Sport Catalytic Converters. With the replacement of the stock downpipes we improve performance, reduce back pressure, increase initial turbo spooling and enhance sound output.

RENNtech products are manufactured to perfectly match the stock AMG GT exhaust system and include all necessary mounting hardware and clamps. Our downpipes are designed and manufactured at the RENNtech Headquarters in Stuart, Florida.


The RENNtech R3 Package is the all-around perfromance and sound upgrade for your AMG GT.



  • RENNtech ECU Upgrade
  • RENNtech BOV Adapters
  • BMC High-Flow Air Filters
  • RENNtech Stage II Turbocharger Upgrade
  • RENNtech Stainless Steel Downpipes w/200 Cell Catalytic Converters
  • RENNtech Fuel System Upgrade


Key Features:

  • Larger impeller (inlet) and turbine (exhaust) cartridge
  • Cartridge shaft is larger and stronger to support larger wheels
  • Entire cartridge is fine balanced as an assembly
  • Lightweight forged billet wheels
  • Less rolling resistance offers quicker spooling
  • Virtually no lag with impressive throttle response
  • Precision machined impeller and turbine housings
  • Up to 734 HP and 633 LB-FT @ crank


  • This Package requires an additional core charge, which will be credited upon return of OEM turbo core to RENNtech
  • We have found the new M178 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory. Numbers will be dependent on conditions and fuel quality.
  • Power gains are calculated with stock numbers measured by RENNtech
  • Our numbers will be dependend on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Package.
  • States known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.


Performance Numbers Overview 

AMG GT (MY2016-2017 | C190 | M178 | 4.0L V8 BiTurbo) Stock Performance (at crank):

  • Rated by Mercedes-Benz:      456 HP @ 6,000rpm; 442 LB-FT @ 1,600-5,000rpm
  • Rated by RENNtech:               506 HP @ 6,250rpm; 495 LB-FT @ 3,850-5,400rpm
    • Note: Mercedes M178 engine performance when measured, obtains higher power numbers than rated from factory.



AMG GT S (MY2016-2017 | C190 | M178 | 4.0L V8 BiTurbo) Modified Performance (at crank):

  • Rated by RENNtech:              734 HP @ 6,800rpm; 633 LB-FT @ 5,600rpm
  •                                                     646 whp @ 6,800rpm; 557 wtq @ 5,600rpm
    • Crank Performance Numbers are calculated with a 12% Drivetrain loss on the AMG GT.


Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm


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7825 SW Ellipse Way - Stuart, FL 34997
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: