2006 Chrysler 300 SRT8. 40K miles. Stock NO modifications by me. The vehicle has had 3 or 4 flashes to the ECU for various reasons. The vehicle does not have the get up and go that it had when new. It appears Chrysler Motors Corporation has downgraded the software by reducing throttle response; tip in full throttle response is slow from 40 or whatever speed to WOT. The tip in is slow and steady, nothing like when the vehicle was new. When new and before any ECU flashes the vehicle was very aggressive in acceleration and shifting. No wheel spin detected and the slapstick would not shift unless you the driver shifted it. I have spoken with the local dealer on numerous occasions about all the changes and the dealer has NO answers. Why did Chrysler Motors Corporation degrade the performance of an otherwise fine automobile? How can I get the original software load from the factory, aka March 2006 load? Again the dealer loads the latest software and states they do not have access to prior versions. And the technicians state this is the best load, the latest version, they have seen. I canNOT agree with this statement. Can you direct me to someone within Chrysler Motors Corporation that can help get the original software back? Can the SRT engineering team give me the full details as to what has happened with the software.