Exedy or Daikin (call it what ever you like) has a section in there webpage about imitations.
Click Here to download the .pdf file to find out ur self or
Click Here to go directly to the original page.
btw: i have the exedy organic OEM replacement on my 4th gen vtec lude and is great.
**edit** you should always make some research before you buy anything from anywhere than the original distributors, i always do.