B58 Gen 1 Build Breakdown (2016–2018 models) - RKTunes

B58 Gen 1 Build Breakdown (2016–2018 models)

July 11, 2025 2 min read

🚘 B58 Gen 1 Build Breakdown (2016–2018 models)

Stock WHP: 330

440 WHP (+110 WHP over stock)

455 WHP (+125 WHP over stock)

All above PLUS below:

  • Hi-Flow Catted Downpipe
  • 93 Octane

510 WHP (+180 WHP over stock)

All above PLUS below:

650 WHP (+320 WHP over stock)

All above PLUS below:

  • RK Tunes Dual Ball Bearing Turbo
  • DS2.5 HPFP OR Port Injection with MOTIV Reflex & 750cc+ Injectors (Link to product)
  • RK Tunes Low-Pressure Fuel Pump

750 WHP (+420 WHP over stock)

All above PLUS below:

  • Stage 1 Transmission / Upgraded Clutch (manual)

850–900 WHP (+520–570 WHP over stock)

All above PLUS below:

  • Full-Frame Turbo (6466)
  • Charge Air Cooler / Upgraded Intake Manifold
  • Stage 2 or Better Transmission

950–1100+ WHP (+620–770 WHP over stock)

All above PLUS below:

  • Full-Frame Turbo (68–70mm+)
  • Fully Built Engine
  • Full Low-Pressure Fuel Pump System (2+)

Notes (B58 Gen 1):

  • βœ… Spark plugs every 10k miles (NGK 94201).
  • βœ… Ignition coils every 50K miles.
  • βœ… New factory direct injectors suggested every 70K miles.
  • βœ… Hi-Flow Catted Downpipes recommended.
  • βœ… Charge pipes get brittle and break randomly.
  • βœ… Manual cars require upgraded clutch at higher WHP.
  • βœ… Port Injection > DI-only for high WHP builds.
  • βœ… RK-Tunes parts recommended but not mandatory.
  • βœ… We NEVER tune with methanol injection.
  • βœ… See Direct Injection vs Direct Injection + Port Injection breakdown for all cars.
  • βœ… Spark Plug Gaps:
    – ≀550 WHP: .030
    – 551–700 WHP: .025
    – 701–850 WHP: .022
    – 851–1000 WHP: .018
    – 1000+ WHP: .016

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