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Custom MHD calibration · B58F · B58G

B58 Custom MHD Tuning

M140i · M240i · 340i · 440i · 540i · 740i and 7 more

Gen 1 & Gen 2 custom calibration built for smooth, reliable power delivery — tuned remotely worldwide, with in-person and mobile support in the Pittsburgh, PA area.

Choose your generationFind Your Tune
Platform
B58 Gen 1 · B58 Gen 2
Setups
6
Base calibration
From $400
Delivery
Remote, worldwide

B58 Gen 1 and B58 Gen 2 setups and pricing.

Gen 1 (B58B30M0) and Gen 2 (B58TU) run different DME software, with different boost, fuelling and torque structures. A Gen 2 file does not belong in a Gen 1 car, and the 540i, M240i and Supra span both generations by model year. Each price is the base calibration from the live catalogue. Fuel and hardware are listed as published for each setup.

All pricing
B58 Custom MHD Tuning setup

Choose your generation's setup to carry it into Find Your Tune. Not sure which you have? Find Your Tune identifies it from the car.

Find Your Tune

Supported hardware and fuels.

  • Stage 1 (stock hardware)
  • Stage 2 (downpipe)
  • Hybrid turbos
  • Pump gas (91/93)
  • E30 / ethanol blends
  • Upgraded HPFP/LPFP
  • Port injection (as applicable)
  • Intercooler / charge pipe
  • Custom torque limits for ZF8

Flash, log, review, revise.

  1. 01Submit IntakeTell us your exact platform, mods, fuel, and goals. This removes guesswork and keeps the tune safe.
  2. 02Receive Base FileYou’ll get a custom map built around your setup — not a generic OTS file.
  3. 03Data LogYou capture a guided log so we can see real-world boost, fueling, and timing behavior.
  4. 04Refine & FinalizeWe revise the map to dial in smooth power, safe fueling, and consistent performance.
The full process

What to have ready

Share your chassis, model year and VIN, turbo and wastegate configuration, downpipes and cooling, fuel and pump or injector upgrades, spark plugs and coils, transmission, and how you use the car. Tell us which flash software and license you have and whether your DME is unlocked; we can confirm compatibility for your setup. Log review and revisions for the calibration are included in the tune price.

How your logs shape the next file

We compare requested and measured boost with wastegate duty to review boost tracking, then check lambda and fuel-pressure channels for delivery limits. Ignition corrections, throttle movement and load or torque limits help explain why the car may not follow the request. The next revision responds to those observations on your hardware and fuel. A log can also expose a problem that needs a mechanical check before more calibration work.

See the datalog channels we reviewFind your tune

Confirm your flashing setup before buying

Not sure which software, adapter or DME unlock your car needs? Send your model, year, hardware, fuel and current flashing setup. We will confirm the supported calibration path and any software, adapter or unlock requirements before you order. You can ask without completing the quote form.

Your setup check, calibration and log reviews are handled by Synergy BMW Tuning, led by Justin, Owner & BMW Calibration Specialist.

Check my setup with Synergy

Inside a B58 Gen 2 calibration

In a published high-boost investigation, Synergy reviewed boost tracking, wastegate duty and RF behavior. Across selected fourth-gear windows at a 29.9 PSI RAM target, mean boost shortfall changed from 1.45 to 0.66 PSI. Temperatures and other conditions also differed, so the comparison does not isolate one change or predict results for another car.

Read the logs and method

Which cars.

From each platform's own vehicle table. The VIN confirms the platform before anything is written.

  • B58 Gen 12016-2021M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, Toyota GR Supra 3.0Chassis and years
  • B58 Gen 22019+M340i, M440i, M240i, 540i, 840i, Z4 M40i, Toyota GR Supra 3.0Chassis and years

B58 Custom MHD Tuning questions.

More answers
How is a custom tune tailored to my car?
The calibration starts with your hardware, fuel and goals. Your logs let us review fueling, boost control and timing and revise the file for your car.
Do I need a downpipe for a B58 tune?
No. Stage 1 is designed for stock hardware. A downpipe typically enables Stage 2 targets and better flow, but it’s not required to start.
What’s the difference between Gen 1 and Gen 2 B58?
They respond differently in airflow and fueling behavior. We account for these differences in boost targets, torque shaping, and safety strategy.
Can I run E30 on stock fueling?
Many setups can run a mild blend, but it depends on your hardware, fuel quality, and platform. We’ll recommend the safest blend based on logs.
How long does the remote tuning process take?
The timeline depends on the setup and how quickly clean logs can be captured and returned. We review each log and revise the calibration as needed.

Tune paths and related pages.

Built around your B58.

Your chassis and year confirm the platform. Your hardware and fuel set the calibration. Your logs set every revision.

Find Your TuneMessage us