If you have foglight holes and no fog lights such as the Euro STD model you can reach in through that opening and undo the hardest to reach bolt to remove resonator on the pre face lifted Euro model. I have a 06 lux and it took me an hour to loosen that one bolt without removing the front bumper.

Check this link out it has a whole write with pics on removing the resonator, hope it helps.

http://www.pryor-place.com/honda/TSXInjenCAI_DIY.htm