Dinan Stage 2 Performance Engine Software for BMW 645Ci E63 Coupe 645Ci E64 Convertible

Dinan D903-4562

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

Performance Engine Software tuned specifically for use with Dinan’s High Flow Intake, optimizing power output as well as improved drivabiltiy. 

Special Note: 

For use with Dinan High Flow Intake System.


  • 2004-2005 BMW 645Ci E63 Coupe 
  • 2004-2005 BMW 645Ci E64 Convertible
  • 2004-2005 BMW 645Ci Convertible
  • 2004-2005 BMW 645Ci Coupe 
Product Specifications:
Labor Hours/Installation Hours 0.50
Emission Status 50 State Emissions Legal
Included Notes Included Item Details