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
ALL TUNING IS DONE VIA MHD ONLY. THIS REQUIRES YOU TO HAVE AN ENET OBD2 ADAPTER, AND THE CORRECT LICENSES FROM THE RESPECTIVE TUNING PLATFORM. IF YOU HAVE ANY QUESTIONS PLEASE CONTACT US BEFORE PURCHASING.
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 - backfire when lifting off throttle. we can modify the level of burble you request
- Flex Fuel capabilities - (REQUIRES ECA KIT VIA MHD OR BM3) 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
🚘 Horsepower Gains
Stock WHP: 440
520 WHP (+80 WHP over stock)
- RK Tunes Front Mount Intake (Link to product)
- Hi‑Flow Catted Downpipes
- Custom Tune from RK Tunes (Link to product)
- MHD Super License (Link to product)
- MHD Wireless Flash Adapter (Link to product)
- NGK 97506 spark plugs (Link to product)
- RK Tunes High‑Output Ignition Coil Packs (Link to product)
- RK Tunes Charge Pipe
- RK Tunes Crank Hub (Link to product)
600 WHP (+160 WHP over stock)
- MHD Flex‑Fuel Kit (Link to product)
700 WHP (+260 WHP over stock)
- RK Tunes Upgraded Twin Turbos
- RK Tunes Low‑Pressure Fuel Pump (Link to product)
800 WHP (+360 WHP over stock)
- Upgraded Charge Cooler
1000+ WHP (+560+ WHP over stock)
- Fully Built Engine
- Full Low‑Pressure Fuel Pump System (2+)
- Upgraded DCT Clutches / Manual Clutch
Notes (S55):
- ✅ Spark plugs every 10 k miles (NGK 97506).
- ✅ Ignition coils every 50 k miles.
- ✅ New factory direct injectors suggested every 70 k miles.
- ✅ Hi‑Flow Catted Downpipes recommended.
- ✅ Charge pipes get brittle and break randomly.
- ✅ Manual cars require upgraded clutch as WHP increases.
- ✅ Port Injection > DI‑only for high WHP.
- ✅ RK‑Tunes parts recommended but not mandatory.
- ✅ We NEVER tune with methanol injection.
- ✅ See Direct Injection vs DI + Port Injection breakdown for all cars.
- ✅ Spark Plug Gaps:
- ≤ 550 WHP: .025
- 551–700 WHP: .022
- 701–850 WHP: .020
- 851–1000 WHP: .018
- 1000+ WHP: .016
Choose options