Could anyone tell me what i would need and what year civic seats would fit and or any other hardware? and if anyone here has done this thanks

 

The seats are no problem. It's the RAILS you'll have trouble with. The Fit seat rails are "irregular" because of the fuel tank under the front seats. Click the thread in my signature for more details.

You might have to fabricate some sort of a solution to make them fit. If you don't mind destroying your stock seats, you can use the stock seat rails...or you could order them from the dealer maybe.

 

There is a thread in the Interior forum about a guy who put Si seats in his 07. The airbags are a plug and play, but the Si doesn't have the passenger presence system, and would need some creative wiring to work properly. Lots of people (including me) have asked about the Acura RSX seats, but I don't think anyone has tried it yet.