MHD Flasher F-Series S55 App Icon

MHD Flasher F-Series S55

The MHD Flasher F+G Series is a complete flash tuning app for your BMW. Unlike a piggyback module, it is capable of complete DME remapping while retaining all OEM safety mechanisms. This allows for maximum performance,maximum safety, and unrivaled drivability.

You can install MHD right at home and start tuning immediately! There is no need to remove and send out your DME for a costly “unlock.” Simply download the MHD Flasher F+G Series app that connects via our MHD Wireless Adapter (or KDCAN cable) to your Android device and your vehicle’s OBD-II port, start the app, and within 5 minutes the initial installation is complete. Further map changes are much faster – only 30 seconds! You can revert your vehicle to the factory OEM flash at any point, and no initial backup is necessary

MHD OTS Maps by PureBoost

We offer a wide selection of OTS maps for the S55 engine suitable for many different vehicle modifications and octane levels. They have been extensively road and dyno tested, just flash and go!


431HP-500HP (GTS)

Stage 1 Maps

91oct/95ron, 93oct/98ron, 95oct/102ron, for stock cars.

Stage 1

up to 530HP/700NM

Stage 2 Maps

91oct/95ron, 93oct/98ron, 95oct/102ron, for cars equipped with high-flow downpipes

Stage 2

up to 560HP/780NM

Stage 2+

up to 575HP/850NM

E85 Mix Maps

For Ethanol blend of 30%+ ST1, ST2, ST2+


up to 580HP (ST2+)


Supported Vehicles

M3 F80 S55
M4 F82 S55
M4 F83 S55
M4 GTS F82 S55
M2 Competition F87

Custom Flash Options

Individual Exhaust Burble

Set your desired exhaust burble (duration, aggressiveness, min rpm, min speed) and enjoy the sporty sound of your S55 powered BMW.

Cold Start Noise Reduction

Suppresses the raised idle rpm at cold start phase.

Fast Map / Option Switching

Switch between your flash options, OTS Maps and Custom-Maps in just 3 minutes, after MHD is installed.

C.S & G.T.S options

G.T.S & C.S DCT transmission software flash (included in flasher license)

G.T.S (500HP) & C.S (460HP) engine style maps (included in flasher license)

G.T.S style startup roar

Limit Power Per Gear

Limit the power per gear (1st – 5th gear) to your desired level.

Adjustable Exhaust Flap Settings

Exhaust flap always open in sport / sport plus for maximum engine sound

Top Speed Limiter Removal

Remove the stock top speed limiter and enjoy the unlimited top speed from your car

Free updates

More flash options are in development and will be released frequently

MHD Prices

Flasher Module

$249 / 249€

Monitor Module

$99 / 99€

Map Pack

$99 / 99€ (each)