S63 F90/F9X M5/M8/X5M/X6M Build Breakdown

🚘 S63 F90/F9X M5/M8/X5M/X6M Build Breakdown

Stock WHP: 550

660 WHP (+110 WHP over stock)

• RK Tunes Front Mount Intake (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 Custom tune (Link to product)
• 2021 or newer? You need a Femto unlock! (Link to product)
  

690 WHP (+140 WHP)

• Hi‑Flow Catted Downpipes

740 WHP (+190 WHP)

• E30 Fuel Blend

830 WHP (+280 WHP)

• RK Tunes Dual Ball Bearing Turbos
• Charge Air Coolers

1000 WHP (+450 WHP)

• Upgraded Intake Manifolds
• MOTIV Reflex (Link to product)
• Full Low‑Pressure Fuel Pump System

Notes (S63 F90/F9X):

• ✅ 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 at higher WHP.
• ✅ Port Injection > DI‑only for high WHP builds.
• ✅ RK‑Tunes parts recommended but not mandatory.
• \*\*✅ We NEVER tune with methanol injection.\*\*
• ✅ See Direct Injection vs Direct Injection + Port Injection breakdown for all cars.
• ✅ Spark Plug Gaps:
  – ≤550 WHP: .030
  – 551–700 WHP: .022
  – 701–850 WHP: .022
  – 851–1000 WHP: .018
  – 1000+ WHP: .016