Dinan Stage 2 Performance Engine Software - 2006-2010 BMW 550i/650i


PART# D903-5052

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$249.95   Suggested Retail
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Performance Engine Software tuned specifically for use with Dinan's High Flow Intake optimizing power output as well as improved drivability. The software safely raises the rev-limiter by 200 RPM for manual and SMG transmissions and 100 RPM for automatics enabling you to carry more road speed in each gear as well as optimize shift points. The top speed governor has been removed enabling the cars to reach their "natural" top speed. Revised EML tuning provides improved drivability by speeding up throttle response.


  • More Power (with intake): Max gains of +26 HP and +21 lb-ft TRQ
  • 50 State Emissions legal; CARB EO # D-176-37
  • 200 RPM rev-limit increase (Manual/SMG); 100 RPM rev-limit increase (Automatics)
  • Improved throttle response
  • Top speed governor removed
  • Smooth and predictable power delivery


Dinan Point Value3
Emission Code1
Factory Rated HP360
Factory Rated Torque (lb-ft)360
Labor Time (Hours)0.5
Max HP Gain26
Max Torque (lb-ft) Gain21
Product TypeEngine Software
Required ItemsDinan Cold Air Intake (D760-0012)
Part NumberD903-5052



This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Tech Resources

Dinan High Flow Cold Air Intake is required in order to run the Stage 2 Performance Engine Software.



    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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