[unmeisa]

I plan on using hondata or ktuner. would I need to buy a new ecu? or does the stock one work?

 

[_Sam]

Per Hondata's website:

"2004-2006 TSXs require a 2007-2008 ECU and adapter cable."

I know Littlebo could tune off the older ECU's, but he seems to have vanished.

 

[TSXPotato]

Check this out might help you a bit.

04-06 TSX – KTuner LLC

 

[bruc]

Yes its tunable. We can tune it

 

[Johnnyboyy]

You can get a reflash but not use SC/TC or bigger cams without 07/08 ECU and flashpro