BMW engine platform · B58G
BMW B58 Gen 2 tuning
For the M340i (G20/G21), M440i (G22/G23/G26), M240i (G42) and 540i (G30/G31 LCI), and 3 more listed below.
B58 Gen 2 (B58TU, G-series) platform. Higher factory output with strong headroom when tuned. Choose your fuel and hardware, then add Flex Fuel / Additional Maps as needed.
- Engine
- 3.0L Single Turbo I6
- Coverage
- 7 models
- Setups
- 3
- Base calibration
- From $400
B58 · Gen 1 and Gen 2 are separate platforms
Which B58 does your car have?
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.
Gen 1 · B58B30M0
- Chassis
- F20 · F21 · F22 · F23 · F30 · F31 · F32 · F33 · F36 · G30 · G31 · G11 · G12 · G01 · G02 · A90
- Model years
- 2016-2021
- Base calibration
- From $400
Gen 2 · B58TU
- Chassis
- G20 · G21 · G22 · G23 · G26 · G42 · G30 · G31 · G14 · G15 · G16 · G29 · A91
- Model years
- 2019+
- Base calibration
- From $400
Cars the BMW B58 Gen 2 is fitted to.
Model, chassis and years for every car on this platform. Where a model has its own page, its name links to it.
Gen 1 and Gen 2 overlap by model year on several of these cars, so send the VIN with your intake and we confirm which one you have before quoting.
| Model | Chassis | Years |
|---|---|---|
| BMW M340i / M340i xDrive | G20/G21 | 2020+ |
| BMW M440i / M440i xDrive | G22/G23/G26 | 2021+ |
| BMW M240i | G42 | 2022+ |
| BMW 540i / 540i xDriveLCI only. The 2017-2019 pre-LCI 540i is Gen 1. | G30/G31 LCI | 2020+ |
| BMW 840i | G14/G15/G16 | 2019+ |
| BMW Z4 M40i | G29 | 2019+ |
| Toyota GR Supra 3.0The 2020 A90 is Gen 1 and takes a different file. | A91 | 2021+ |
B58 Gen 2 setups and pricing.
Each price is the base calibration, from the live catalogue. Fuel and hardware are listed as published for each setup.
Choose a setup to carry it into Find Your Tune, or continue with B58G and choose there.
Continue with B58GAdd-ons
From the catalogue. Where the price depends on the setup, each is listed.
- Additional Maps
- Stock Turbo $200 · Hybrid Turbo $250
- Flex Fuel
- $200
- Rush Delivery
- $100, any order
The B58 Gen 2, technically.
Strong midrange, stable boost control, and repeatable results via logging.
- Engine
- 3.0L Single Turbo I6
- Generation
- Gen 2 · B58TU
- Fuels published
- 91 · 93 · E30/E40 · E40 · E85
- Flash software
- MHD, bootmod3 or another supported OBD tool, confirmed at quote
- Transmission
- TCU calibration for ZF 8HP and DCT where software support exists
- Delivery
- Remote, worldwide
Reference outputs
Published ranges, setup dependent, not a guarantee. Targets on your car are set from its hardware and its logs.
Stock Turbo / Bolt-On
- Stage 1 (93)
- ≈ 400–440 whp
- Stage 2 (93, FBO)
- ≈ 450–500 whp
Calibrated from your logs.
No dyno appointment. You flash a base calibration, log the car and send it back, then we read the data and revise until it is clean.
- 01
Submit your build
Chassis, engine, full mod list and target fuel. This defines a safe calibration starting point before any file is touched.
- 02
Receive a base map
A conservative calibration matched to your hardware and fuel, flashed with your own software at home.
- 03
Log and send back
Full-throttle pulls and part-throttle data captured on our channel list, then sent over for review.
- 04
Review and revise
We read the logs, adjust the calibration and repeat until the car is running clean and on target.
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 methodGuides and related pages.
Technical reading for the B58 Gen 2, and the pages around it.
- Tune pathBMW B58 Stage 1 TuneB58 Stage 1 is a custom ECU calibration on the factory turbo and factory exhaust. What it changes, what your car needs first, what to log, and what it costs.
- Tune pathBMW B58 Stage 2 Tune (Downpipe)B58 Stage 2 is the calibration for a downpiped car: less backpressure, different wastegate behaviour, and a charge-air load the stock intercooler was not sized for.
- Tune pathBMW B58 E30 TuneA B58 E30 tune is a calibration for a fixed 30% ethanol blend. What E30 buys in knock resistance, what it costs in fuel flow, and how to mix it repeatably.
- Tune pathBMW B58 E85 TuneA full-E85 B58 calibration asks 30-40% more fuel mass than pump gas. What the fuel system must support first, and why E85 is a hardware decision before a tune.
- Tune pathBMW B58 Tune (Gen 1 & Gen 2)Which B58 you have, chassis by chassis, and the calibration path that follows from it.
- Tune pathB58 vs N54 Tune Guide | Power, Reliability, and Upgrade PathsCompare BMW B58 vs N54 tuning potential, fueling, spool, reliability, and supporting mods for daily-driven and big-power builds.
B58 Gen 2 questions.
More answers- Which cars use the B58 Gen 2?
- BMW M340i / M340i xDrive (G20 / G21, 2020+), BMW M440i / M440i xDrive (G22 / G23 / G26, 2021+), BMW M240i (G42, 2022+), BMW 540i / 540i xDrive (G30 / G31 LCI, 2020+), BMW 840i (G14 / G15 / G16, 2019+), BMW Z4 M40i (G29, 2019+) and Toyota GR Supra 3.0 (A91, 2021+). Gen 1 and Gen 2 overlap by model year on several of these cars, so send the VIN with your intake and we confirm which one you have before quoting.
- How much does a B58 Gen 2 tune cost?
- Stock Turbo $400, Hybrid Turbo $450 and Big Single Turbo $500, from the Synergy catalogue. Add-ons: Additional Maps $200–$250, Flex Fuel $200.
- Which fuels does each B58 Gen 2 setup support?
- Stock Turbo: 91, 93 or E30/E40. Hybrid Turbo: 91, 93 or E30/E40. Big Single Turbo: 93, E40 or E85.
- Is a B58 Gen 2 tune the same as a B58 Gen 1 tune?
- No. 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.
Built around your B58 Gen 2.
Your chassis and year confirm the platform. Your hardware and fuel set the calibration. Your logs set every revision.