RennTech R1 Performance Package For Mercedes-Benz C209 CLK 550

VENDOR: RennTech

SKU: PKG.209.CLK550.PERF01

All orders will include an AutoTalent window decal


The RennTech R1 Performance Package is the perfect entry level performance upgrade for the C209 CLK 550. The R1 performance package for the Mercedes 550 includes our proprietary ECU upgrade in addition to our stainless steel shorty headers designed specifically for the 550 V8 for a combination that provides increased performance, sound and throttle response across the vehicles entire powerband.

The R1 performance package increases performance to  413HP and 422 TQ at the crank, without sacrificing daily driver comfort or reliability and offer huge gains across the entire RPM range. Due to increased power and boost levels, 93 Octane or higher gasoline has to be used with R1 upgraded RennTech vehicles to avoid damage to the engine. States known for poor fuel quality have to be supplied with a lower power setup.


  • Long-lasting and driver reliability
  • Significant gains in horsepower
  • Increases the performance
  • Significant gains torque 
  • Increases horsepower
  • Increases throttle response
  • Increasing the engine's rev limiter
  • Incredible performance gains
  • RennTech ECU Upgrade
  • Stainless Steel Shorty Headers

      Stock Performance:

      • 382 HP / 391 LB-FT

      Modified Performance:

      • 413 HP / 422 LB-FT

      Vehicle Fitment:    

      • 2004 Mercedes-Benz C209 CLK 550
      • 2005 Mercedes-Benz C209 CLK 550
      • 2006 Mercedes-Benz C209 CLK 550
      • 2007 Mercedes-Benz C209 CLK 550
      • 2008 Mercedes-Benz C209 CLK 550
      • 2009 Mercedes-Benz C209 CLK 550
      • 2010 Mercedes-Benz C209 CLK 550


                                Images are for representation purpose only and may differ depending on application.