Performance tune for S55 - F8x M2 M3 M4

This is our tried and tested tune for the S55 platform. These tunes were designed on a Dynojet dyno and tested in the real world! 

PLEASE NOTE: 2021 MODEL YEAR M2 COMPETITION REQUIRES AN ECU BENCH UNLOCK BEFORE TUNING IS POSSIBLE. FOR MORE INFORMATION PLEASE EMAIL sales@rktunes.com

We personally recommend using MHD for all tuning(requires purchase of MHD adapter and flasher license), but is not required if you are only using our OTS tune. Only required if you are seeking custom tuning/datalogging, you must also purchase the MHD monitor license as well.

 If you do not want to use MHD, a Windows computer is required to utilize the RK-Tunes flash software.The device must have a ethernet port, or you must have a ENET to USB adapter. Check FAQ section for windows device recommendation.

KEY FEATURES: 
⦁ Increased boost pressure
⦁ Top speed governor removed
⦁ Increased RPM rev limit
⦁ VANOS cam timing adjustment
⦁ Improved throttle response
⦁ Increased valvetronic valve lift
⦁ Ignition timing enhancements
⦁ Air/Fuel Ratio enhancements

OPTIONS:

•  Fuel - Selectable fuel octane rating (91, 93) - E85 tuning also available
  
• Burble - Emits flame and backfire when lifting off throttle. Only suggested for catless exhaust systems.
• Rear O2 Sensor Delete - If you are running aftermarket headers please select O2 Sensor delete. We will remove all coding associated with rear O2 sensors 
• Cold Start Delete - All BMW's have a cold start calibration to heat up the catalytic converters. If you're unhappy with the way your BMW idles/runs while cold, select this option and we will adjust the cold start in your tune. Highly advised if you are running a catless exhaust system.
• Flex Fuel capabilities - (REQUIRES MHD & ECA KIT) No longer do you have to calculate how much E85 you have to put in your car, or reflash when changing fuels! Just fill it up and the ECU will auto adjust to run based off of the ethanol content inside your gas tank.

PERFORMANCE SPECS BASED ON MODIFICATIONS:
60-100+ WHP
70+ FT/LBS TQ

Supported vehicles:

• F8x M3/M4
  
• 2019-2021+ F87 M2 Competition