After many hours of further research, tuning, and testing we have improved on our hugely popular Stage 1 Performance Software. Our team was able to make Stage 2 much faster by improving turbo response across the power-band. This tuning is especially noticeable in the first two gears, now catapulting the car off the line. Tuned for a smooth power-band to put down predictable and even power in all gears and throttle positions. This smoothness improves the quality of the shifting and the overall drivability.

From a standing start (with the traction control fully disengaged) all it takes is the press of the throttle to the floor to get the tires spinning. The everyday practicality of a full-size sedan with the fun of a sports car, this is the definition of "Performance Without Sacrifice".

With Dinan's software, your 550i will be capable of achieving its natural top speed as the governor has been removed. And as always, Dinan matches the new car warranty coverage for up to 4 years or 50,000 miles, including the possibility of consequential damages. No one offers better performance or backs it up with such comprehensive warranty coverage.

Stage 2 Features:

• More Power: Max gains of +95 HP @ 6000 RPM and +87 lb-ft TRQ @ 3500 RPM
• 50 State Emissions legal; CARB EO # D-176-39
• Improved throttle response
• Top speed governor removed
• Full Map Rescaling, for drivability from idle to wide open throttle and everywhere in between
• Properly Returned Fuel Mixtures, to save you gas and protect your engine
• Retain all BMW factory engine damage safeguards
  
  
  Not compatible with the 550i (F07/F10) from 2014-2016.
  

Stage 3 Performance Software Get the most out of your performance upgrades from the combination of the Performance Software and your Dinan parts upgrades. Software upgrades are specifically designed and tuned for the Dinan upgrade.

Stage 3 Features:

• More Power (with exhaust): Max gains of +100 HP @ 5000 RPM and +89 lb-ft TRQ @ 3500 RPM
• 50 State Emissions legal; CARB EO # D-176-39
• Improved throttle response
• Top speed governor removed
• Full Map Rescaling, for drivability from idle to wide open throttle and everywhere in between
• Properly Returned Fuel Mixtures, to save you gas and protect your engine
• Retain all BMW factory engine damage safeguards
  
  
  Not compatible with the 550i (F07/F10) from 2014-2016.
  
  

Stage 4 Engine Software is for use with the High Flow Intake/Strut Brace, ensuring optimum performance and drivability.

Stage 4 Features:

• More Power (with exhaust and intake/strut brace): Max gains of +109 HP @ 6000 RPM and +96 lb-ft TRQ @ 6000 RPM
• 50 State Emissions legal; CARB EO # D-176-39
• Improved throttle response
• Top speed governor removed
• Full Map Rescaling, for drivability from idle to wide open throttle and everywhere in between
• Properly Returned Fuel Mixtures, to save you gas and protect your engine
• Retain all BMW factory engine damage safeguards
  
  
  Not compatible with the 550i (F07/F10) from 2014-2016.
  
  Dinan High Flow Intake/Strut Brace is required in order to run the Stage 4 Performance Engine Software.
  
  

Stage 5 Engine Software is for use with the High Flow Intake/Strut Brace and High-Performance Intercoolers, ensuring optimum performance and drivability.

Stage 5 Features:

• More Power (with exhaust, intake/strut brace and intercoolers): Max gains of +131 HP @ 6500 RPM and +110 lb-ft TRQ @ 6000 RPM
• 50 State Emissions legal; CARB EO # D-176-39
• Improved throttle response
• Top speed governor removed
• Full Map Rescaling, for drivability from idle to wide open throttle and everywhere in between
• Properly Returned Fuel Mixtures, to save you gas and protect your engine
• Retain all BMW factory engine damage safeguards
  
  
  Not compatible with the 550i (F07/F10) from 2014-2016.
  
  Dinan High Flow Intake/Strut Brace and Intercoolers are required in order to run the Stage 5 Performance Engine Software.