Performance tune for F+G Series B58 - 240i 340i 440i 540i M240 M340 M440 A90 Supra
This is our tried and tested tune for the B58 platform. These tunes were designed on a Dynojet dyno and tested in the real world!
PLEASE NOTE: 2021+ MODEL YEAR CARS REQUIRE AN ECU BENCH UNLOCK BEFORE TUNING IS POSSIBLE. FOR MORE INFORMATION PLEASE CLICK HERE
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 Please mention in modifications box if you want this!)
-
Burble - backfire when lifting off throttle. we can modify the level of burble you request
- Flex Fuel capabilities - (REQUIRES 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.
- Map Switching - Add multiple maps to your ECU, and use the BC button to switch on the fly! Perfect for if you are changing fuels, or want different burble settings saved.
PERFORMANCE SPECS BASED ON MODIFICATIONS:
60-100+ WHP
70+ FT/LBS TQ
Supported vehicles:
-
F3x 340i/440i
- F2x M240i/140i
- G3x 540i
- G1x 740i
- G32 640i GT
- X3/X4 M40i
- G05 X5 40i
- G29 Z4 M40i
- A90/A91 Toyota Supra
🚘 Horsepower Gains
B58 Gen 1 Build Breakdown (2016–2018 models)
Stock WHP: 330
440 WHP (+110 WHP over stock)
- MHD Super License (Link to product)
- MHD Wireless Flash Adapter (Link to product)
- NGK 94201 spark plugs (Link to product)
- RK Tunes Front Mount Intake (Link to product)
- RK Tunes High Output Ignition Coil Packs (Link to product)
- RK Tunes Charge Pipe
- RK Tunes Custom tune (Link to product)
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:
- E30 Fuel Blend
- MHD Flex-Fuel Kit (Link to product)
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):
- ✅ Spark plugs every 10k miles (NGK 94201).
- ✅ Ignition coils every 50K miles.
- ✅ New factory direct injectors suggested every 70K 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: .025
– 701–850 WHP: .022
– 851–1000 WHP: .018
– 1000+ WHP: .016
B58 Gen 2 Build Breakdown (2019+ models)
Stock WHP: 340
440 WHP (+100 WHP over stock)
- MHD Super License (Link to product)
- MHD Wireless Flash Adapter (Link to product)
- NGK 94201 spark plugs (Link to product)
- RK Tunes Front Mount Intake (Link to product)
- RK Tunes High Output Ignition Coil Packs (Link to product)
- RK Tunes Charge Pipe
- RK Tunes Custom tune (Link to product)
455 WHP (+115 WHP over stock)
All above PLUS below:
- Hi-Flow Catted Downpipe
- 93 Octane
510 WHP (+170 WHP over stock)
All above PLUS below:
- E30 Fuel Blend
- MHD Flex-Fuel Kit (Link to product)
650 WHP (+310 WHP over stock)
All above PLUS below:
- RK Tunes Dual Ball Bearing Turbo
- Port Injection with MOTIV Reflex & 750cc+ Injectors (Link to product)
- RK Tunes Low-Pressure Fuel Pump
750 WHP (+410 WHP over stock)
All above PLUS below:
- Stage 1 Transmission / Upgraded Clutch (manual)
850–900 WHP (+510–560 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 (+610–760 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 2):
- ✅ Spark plugs every 10k miles (NGK 94201)
- ✅ Ignition coils every 50K miles
- ✅ New factory direct injectors suggested every 70K 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: .025
701–850 WHP: .022
851–1000 WHP: .018
1000+ WHP: .016
Choose options