The kit works great on a 97 EX but is not CARB certified which really doesn't matter unless you live in California - CARB=California Air and Resource Board.
I have the kit on my 97 EX and I love it. There are a few other kits out there, Drag, F-Max, Revhard, not to mention custom, but unless you plan on building your engine to make up for the added power they will give you, stick with the Greddy or Apexi kits.
You will see the prices for the kit vary and being sold for as high as the suggested retail of $1995 but if you pay more than $1500, you paid too much.
I have a website devoted to the installation of the Greddy kit at
http://www.turbocivic.net that can help you. Feel free to emai lme too.
peace, Steve