Tuned by MAR

Calibration
and precision.

Custom tunes for the S58, B58, S55, S63 and S68. Written for your exact car, parts and fuel, from stock to track-focused builds.

Build your tune See supported cars
The Tuned by MAR app's log viewer on an S58 E50 flex pull, showing boost against boost target, timing correction, RPM and throttle.
The Tuned by MAR log analyzer, reviewing an S58 E50 flex pull.

Remote tuning,
from stock to track-focused.

Daily drivers on pump gas. Upgraded-turbo builds on ethanol. Every tune is calibrated for the parts and fuel on your car.

  1. Stock
  2. Bolt-ons
  3. Upgraded turbos
  4. Flex fuel
  5. Track-focused

S58

  • M3 (G80, G81)
  • M4 (G82, G83)
  • M2 (G87)
  • X3 M (F97)
  • X4 M (F98)

Flex fuel available. G8x cars need a DME unlock, done in house.

B58

  • M340i, M440i (to 2024)
  • M240i, M140i
  • 340i, 440i, 540i, 740i
  • X3 M40i, X4 M40i, Z4 M40i
  • Toyota GR Supra 3.0

Gen1 and Gen2, flex fuel available. 2025+ B58TU2 cars aren't supported yet.

S55

  • M3 (F80)
  • M4 (F82, F83)
  • M4 GTS
  • M2 Competition (F87)

Flex fuel available.

S63

  • M5 (F90)
  • M8 (F91, F92, F93)
  • X5 M (F95, 2020–2023)
  • X6 M (F96, 2020–2023)

S63TU4. Ethanol runs as a fixed blend, so there's no flex add-on.

S68

  • M5 (G90, G99)
  • XM (G09)
  • X5 M, X6 M (2024+)
  • X5, X6, X7 M60i
  • 760i

Both DMEs are unlocked in house before the first flash.

In-house DME unlocks.

Most cars built after mid-2020 need the DME unlocked before MHD or bootmod3 can flash a tune, and every S68 needs both DMEs unlocked. I do unlocks in house, so your car goes from locked to tuned without a second shop.

Need one? Choose "Needs an unlock" when you order, and I'll quote it with your tune.

  • S58Every G8x M3, M4 and M2, and X3 M and X4 M built after mid-2020
  • B58Cars built after mid-2020
  • S63Cars built after mid-2020
  • S68Every car, both DMEs

How it works

  1. Order

    Pick your engine, turbo setup and add-ons, then tell me about your car, mods and fuel.

  2. Flash and log

    I build a first map for your exact setup. You flash it and send me a datalog.

  3. Dial it in

    I review every log you send and revise the map for the parts and fuel on your order.

Build your tune

Prices are per car and include revisions for the parts and fuel on your order. Your MHD or bootmod3 license and flashing hardware are bought separately, and unlocks are quoted with your tune.

Engine
Turbo setup
Add-on
Your car
Contact

Questions

What do I need before ordering?

A flashing license for your car (MHD or bootmod3), the cable or WiFi adapter that platform uses, and a phone to flash and log (bootmod3 also runs on a laptop). Some cars need a DME unlock first, which I do in house. For flex fuel you also need an ethanol content sensor installed.

Does my car need a DME unlock?

Most cars built after mid-2020 do, and every S68 needs both DMEs unlocked. Unlocks are done in house. Choose "Needs an unlock" or "Not sure" when you order and I'll confirm it and quote it with your tune.

MHD or bootmod3?

Both work on the S58, B58, S55 and S63. If you already own a license, use that one. If you're not sure, choose "Not sure yet" and I'll recommend one for your car before you buy a license. The S68 isn't supported by either yet, so I'll walk you through how your S68 is flashed.

What counts as an upgraded turbo?

Anything other than the factory turbo: hybrid and upgraded turbos, and single turbo kits. Enter the make and model when you order so I know what I'm calibrating for.

What happens after I pay?

You get an order confirmation by email, then I follow up with logging instructions for your platform. From there it's flash, log, send, revise.

Can I get a refund?

Yes, in full, until I send your first map. After that the tune is custom work for your car and isn't refundable.

Terms

Your setup. Each tune is written for the car, parts and fuel you describe. Tell me before you change hardware or fuel, because a tune built for one setup can damage an engine running another.

Licenses, parts and unlocks. Flashing licenses, cables, adapters and ethanol content sensors are sold separately by their makers. DME unlocks are quoted separately.

Refunds. You can cancel for a full refund until I send your first map. After that, tunes are non-refundable.

Risk. More power adds stress to the engine and drivetrain, can void your warranty, and is at your own risk.

Off-road use. Tunes are sold for off-road and competition use only. Under California and federal emissions law, changing the engine calibration of a car driven on public roads can be illegal. You're responsible for how and where your car is used.

Privacy

I use your name, email, phone and car details only to build, deliver and support your tune. Stripe handles your payment, and Resend sends the order emails. I don't sell or share your information with anyone else. To see or delete what I have about you, email tunedbymar@gmail.com.