Dinan Stage 2 Performance Engine Software - 1997-1998 BMW 323i


PART# D903-2332

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$149.95   Suggested Retail
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Stage 2 Engine Software is for use with the Dinan Cold Air Intake System; optimizing performance and drivability from the combination. Dinan Performance Engine Software unleashes more power by re-programming the fuel mixture and ignition timing parameters of the engine management system. Furthermore the software safely raises the rev-limit, giving your BMW a broader power band and greater road speed potential in each gear. Significant gains are also achieved at part throttle making extra power available where you spend the bulk of the time driving. The top speed governor has also been eliminated enabling the vehicle to achieve its "natural" top speed.


  • More Power (with intake): Max gains of +12 HP and +11 lb-ft TRQ
  • 50 State Emissions legal; CARB EO # D-176-13
  • Rev-limit increased
  • Improved throttle response
  • Top speed governor removed
  • Smooth and predictable power delivery


Dinan Point Value3
Emission Code1
Factory Rated HP168
Factory Rated Torque (lb-ft)181
Labor Time (Hours)0.5
Max HP Gain12
Max Torque (lb-ft) Gain11
Product TypeEngine Software
Required ItemsDinan Cold Air Intake (D760-0321B)
Part NumberD903-2332



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



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