RennTech R1 Performance Package For Mercedes-Benz C199 SLR McLaren

VENDOR: RennTech


All orders will include an AutoTalent window decal


The RennTech R1 Performance Package is the perfect entry level performance upgrade for the SLR McLaren. RennTech SLR package 1 contains our proprietary ECU Upgrade, upgraded pulley and dual intercooler pump kit.

The R1 performance package increases performance to 722HP and 715TQ 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.


  • Gains up to +98 HP / +140 LB-FT
  • 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
  • RennTech upgraded pulley
  • RennTech dual intercooler pump kit

      Stock Performance:

      • 626 HP @ 6500 RPM; 575 LB-FT @ 3250-5000 RPM

      Modified Performance:

      • 722 HP @ 6400 RPM 715 LB-FT @ 4000 RPM

      Vehicle Fitment:    

      • 2005 Mercedes-Benz C199 SLR McLaren
      • 2006 Mercedes-Benz C199 SLR McLaren
      • 2007 Mercedes-Benz C199 SLR McLaren
      • 2008 Mercedes-Benz C199 SLR McLaren
      • 2009 Mercedes-Benz C199 SLR McLaren
      • 2010 Mercedes-Benz C199 SLR McLaren
      • 2011 Mercedes-Benz C199 SLR McLaren


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