Dinan Stage 4 Performance Engine Software - 1997-1998 BMW 540i
$249.95
Stage 4 Engine Software is for use with the High Flow Cold Air Intake and Air Flow Meter, ensuring optimum performance and drivability. Dinan Performance Engine Software unleashes more power from your BMW 540i E39 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. As an example, a peak gain of 8 horsepower at 3500 rpm has been achieved at part throttle with the revised programming.
Features:
- More Power (with intake and air flow meter): Max gains of +23 HP and +25 lb-ft TRQ
- 50 State Emissions legal; CARB EO # D-176-26
- Top speed governor removed
- Rev-limit increased
- Improved throttle response
- Smooth and predictable power delivery
Not compatible with the 540i (E39) from 1999-2003. Dinan Cold Air Intake System and Air Flow Meter are required in order to run the Stage 4 Performance Engine Software.
Read More