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Dinan Stage 1 Performance Engine Software - 2015-2020 BMW M2/M3/M4


Part # D900-S55-S1
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Dinan has a long and storied past when it comes to engine tuning having introduced our first engine performance chip in the mid 80's - over 3 decades ago. From those early years with chips, followed by engine software and then to our own external control modules we have become experts in nearly every possible way to extract safe, reliable power from the factory powerplant. While we have long preferred the unheard of control and sophistication capable of being achieved from engine software, over the past 6 years that option was not one afforded to us. That changes now with the re-introduction to flash tuning for Dinan with the S55 engine. The first of the next generation of Dinan flash tunes, the S55 calibrations are held to the same principles of the past; performance, reliability, and safety. Dinan performance engine software is so much more than just turning up the turbo boost after all. It is a fully re-tuned engine management program that maximizes power while keeping all the BMW factory safeguards in place. Protecting your BMW while giving the most performance is the definition of "Performance Without Sacrifice". Drivetrain and engine components are analyzed for strength then the calibration is tested on the dyno and in the real world for durability and drivability. This next generation of Dinan flash tunes does differ from the past however in that there are many different options to choose from depending on your needs or desires. Whether you want a warranted tune for 93 pump gas when under the factory warranty, an E85 performance tune for maximum performance when outside of the factory warranty or something in between, chances are Dinan has an option for you. The Dinan Stage 1 Performance engine software is designed for the S55 engine to yield maximum power (for a variety of different octanes), improve drivability, and the removal of the factory speed governor for unadulterated entertainment.


  • More Power: Max gains up to 146 HP / 155 lb-ft of torque over stock on the F87 M2C and 122 HP / 145 lb-ft of torque over stock on the F8x M3/M4 using E85. Consult the performance charts for detailed data and additional octanes.
  • Dinan Stage 1 performance software includes a limited lifetime warranty against defects in the software and provides free updates and reflashes as they become available. Labor or shipping charges are not included in the warranty.
  • Access to numerous octane callibrations depending on your needs (91, 93, 100, 104, and E85). Switching between mappings would require a reflash at a Dinan authorized dealer.
  • The Dinan Heat Exchanger (D780-0001A) or equivalent is highly recommended when running ANY of the Stage 1 maps. Without it the vehicle will tend to heat soak / derate under any meaningful load. Advertised gains as a result will not be possible.
  • Full map rescaling for drivability from idle to wide open throttle and everywhere in between
  • Top speed governor removed
  • Upgradeable from DINANTRONICS - See the Purchase Guide or FAQ linked below for details
  • Retains all BMW factory engine damage safeguards
  • Torque gains drastically improve acceleration
  • No hesitation between shifts
  • Downloads through the OBD2 Port - See compatability notice at the bottom of the product page
  • Hassle free operation — Install and enjoy

About Dinan

Dinan knows European marques – quite literally – from the inside out. Whether you need hard parts such as exhaust systems or coilovers, or ECU upgrades to unlock your engine's potential, Dinan has the parts to take your BMW, Mercedes-Benz, or Mini to the next level.

Brand Dinan
Dinan Point Value3
Emission Code4
Factory Rated HP405 - 425 (441-480 Measured)
Factory Rated Torque (lb-ft)406 (441 Measured)
Labor Time (Hours)0.5
Max HP Gain164 @ 5500 RPM (E85 M2C); 136 @ 5000 RPM (E85 M3/M4)
Max Torque (lb-ft) Gain169 @ 4000 RPM (E85 M2C); 159@ 4000 RPM (E85 M3/M4)
Peak HP584 @ 6000 RPM (E85 M2C); 584 @ 6000 RPM (E85 M3/M4)
Peak HP Gain112 @ 7000 RPM (E85 M2C); 73 @ 7000 RPM (E85 M3/M4)
Peak Torque (lb-ft)599 @ 4000 RPM (E85 M2C); 599 @ 4000 RPM (E85 M3/M4)
Peak Torque (lb-ft) Gain113 @ 3000 RPM (E85 M2C); 159 @ 4000 RPM (E85 M3/M4)
Product TypeEngine Software
WarrantyLimited Lifetime Warranty
Part NumberD900-S55-S1

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Dinan Heat Exchanger (D780-0001A) or equivalent is recommended when running ANY of the stage 1 maps. Without the heat exchanger installed the vehicle will tend to heat soak / derate under any meaningful load. Advertised gains as a result will not be able to be achieved. See compatibility notice at the bottom of the product page for information on potential limitations to an OBD2 flash.
Limited Lifetime Warranty: See Details

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Some parts are not legal for use in California or other states with similar regulations.

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