Dinan Stage 2 Performance Engine Software for BMW 525i & Sport Wagon E39 2001-2003

"Stage 2 Engine Software is for use with the High Flow Cold Air Intake optimizing performance and drivability.

Dinan software is not available for purchase on-line as it must be downloaded by an Authorized Dinan Dealer using specialized equipment. Contact your local Dinan Authorized Dealer directly for the purchase and installation of Dinan software."