So I just picked up my F4i and it's all stock and I would love to fit a pipe on it but I have spoken to my mate who has been riding for years and he said that it's best to ask if any parts from a 600rr fit or even a fireblade.

Any ideas would be much appreciated.

 

No, you need an exhaust for an F4i. There are many.

 

Congrats on the bike! I've had mine for just over two months and love it! As for a pipe, there are many options so it is really up to you. I went with a Coffman Shorty and really like how it "slims" down the look of the bike, in addition to the weight savings over the stock cannon. It is a bit loud, even with all the baffles left in, but I just keep the RPM's low until I get out of my neighborhood...

 

Depends on how much you have to spend!
I'd spring for an Arrow or Yoshi slip on, as it'll give a good performance gain, not too noisy (Bonus for trackways in the UK), and keeps the local officers happy (:

I currently have a delkevic system on my F Sport, but it's far too loud. Tested at the local circuit on the noise meter at 114db... 109 with the baffles in.