RENNtech ECU+ Upgrade | R231 | SL 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278

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RENNtech ECU+ Upgrade | R231 | SL 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278ECU+ Upgrade 540HP 705LB FT Gains: +66HP +139LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be

The maximum power number reached with the RENNtech ECU Plus Upgrade for the C253 - GLC 43 AMG Coupe is 416 HP and 460 LB-FT

204 - C 63 AMG (2012+)

With the proprietary RENNtech ECU Tuning the C190 AMG GT gains up to +95 HP and +131 LB-FT

212 - E 63 AMG

Matte Finish

Our rear diffuser is the companion component to the front splitter and functions to decrease drag and increase down force by improving the underbody airflow and its transition to ambient air

MY2007 - 2020 Tuned via RENNtech HHT | Hand-Held Tuner

RENNtech performance software unleashes the true potential of your Mercedes

The center section of the diffuser also accepts the EU third brake light or may also be removed and a mesh grill insert installed for an even more customized look

Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 362 HP and 384 lb/ft torque

Rated by RENNtech: 421 HP @ 5

RENNtech ECU HHT (HandHeldTuner) for the 209 - CLK 550

Exchange/Return Notes