its all good, I figured you mean F23.
a nitrious kit will run you about $400-600, there are no major modifications, all you have to do is install it and bolt it up. or if your not sure a shop can do it for you for roughly $200-300. you can safely run a 65-75 shot on an F23. you'll need to run premium, and you have to use colder spark plugs. I've got a zex dry kit that I'm going to be installing soon. I got it off a friend and I'm actually the 4th owner of the kit, and all the accords that owned the kit ran perfectly fine with the kit, and their accords are still on the road driving fine now. its way cheaper and easier to do than an engine swap, or a turbo but you are limited by what's in the bottle. once you run out, you've got to fill up just like gas.