Dinan Performance Engine Software for BMW 645Ci E63 2004-2005

Special Note: K&N free flow air filter element recommended for optimum performance.
Product Description
The software safely raises the rev-limiter by 250 rpm, 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.

Performance Engine Software is now available for the 645, extracting additional power as well as improving drivabiltiy. 


  • 2004-2005 645Ci E63 Coupe 
  • 2004-2005  645Ci E64 Convertible 
Product Specifications
Labor Hours/Installation Hours 0.50
Emission Status 50 State Emissions Legal
Max HP Gain 8 @ 6500 rpm*
Max Torque Gain 6 lb-ft @ 6500 rpm*
Included Notes Included Item Details