Dinan Performance Engine Software - 2003-2006 BMW Z4


PART# D900-27Z

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$119.95   Suggested Retail
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Dinan Engine Software safely raises the rev-limit by 240 RPM, endowing your car with a broader power band and greater road speed in each gear. The software also removes the top speed governor, enabling the cars to attain their "natural" top speed. Reprogramming of the drive by wire throttle system speeds up throttle response, dramatically reducing the delayed response to throttle inputs exhibited with the stock programming.


  • More Power: Max gains of +5 HP @ 5800 RPM and +6 lb-ft TRQ @ 3600 RPM
  • 50 State Emissions legal; CARB EO # D-176-35
  • 240 RPM rev-limit increase
  • Improved throttle response
  • Top speed governor removed
  • Smooth and predictable power delivery


Dinan Point Value3
Emission Code1
Factory Rated HP184
Factory Rated Torque (lb-ft)175
Labor Time (Hours)1
Max HP Gain5 @ 5800 RPM
Max Torque (lb-ft) Gain6 @ 3600 RPM
Product TypeEngine Software
Part NumberD900-27Z



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

Not compatible with the Z4 2.5i (E85) from 2007-2008. K&N free flow air filter element recommended for optimum performance.



    *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.