Ya, when I talked to the rep at FMF he said most people do not find they have to re-jet....however every bike is a bit different.

Josecaldern91....you should be able to get a slip-on for alot less than 400$ if you shop around. I know some exhausts are pretty pricey but Jardine and FMF for example can be had to your door for around 300$.

 

platnumbob yeah I'm going to look around and hope I find a good deal

 

got a slip on, jet kit and k&n filter for $160. the pipe was brand new, filter was used, and jet kit was new, just search e-bay for good deals, you dont have to buy a exhaust can specifically for the f4, I got one for a r6, then got a used aftermarket mid pipe,

 

Where did you find this slip on? i have looked around and they're like 700$