RENNtech ECU Upgrade for S 550 | W221 | 402 HP / 405 LB-FT | MY2007-2010

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RENNtech ECU Upgrade for S 550 | W221 | 402 HP / 405 LB-FT | MY2007-2010RENNtech ECU Upgrade for 221 S 550. Up to 402HP and 405 LB FT. Gains: +20HP & 14 LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning software

SL 550 (R230) Stock Performance:

750rpm Note: Mercedes M176 engine performance when measured on the dyno obtains higher power numbers than rated from factory

370 HP @ 5500 RPM

C207 - E 550 Coupé – M278 | 4

Rated by RENNtech (peak @wheel): 502 whp @ 4

This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market

With the proprietary RENNtech ECU Tuning the X253 - GLC63 AMG 4MATIC+ gains up to +75 HP and +113LB-FT

The RENNtech Stage I Turbo Upgrade comes with an ECU upgrade and performance air filter

This front splitter is a fully functional aerodynamic component as well as an aggressive exterior enhancement on the muscular CLS

604 HP @ 5500 RPM

Porsche Panamera Turbo (971) 2016 - 2020

5L Supercharged) Stock Performance:

Exchange/Return Notes