I was told by a friend of mine that if you change the ecu before you add any mods such as i/h/e that the gains will be better. Is this true? Should I put the 04 TSX hondata reflash on my 05 TSX? Will the gains be as good as Hondata states on their webpage?

Thanks for the help guys

 

It doesn't matter what order you do the mods but they can't flash the 05 ECU just yet.