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 [email protected] 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. 🚘 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
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