I put on a PC3, Graves 3/4 exhaust (eliminated the cat but kept the exup) and had it dyno tuned. It was a night and day improvement. I don't have words to describe how much better the bike is after these simple mods.:flex:

 

How much are you prepared to spend?...:crash

Here's what I've done to my 06 (basically the same as your 04), all of these mods would work on yours. :sneaky
http://www.r1-forum.com/forums/showthread.php?t=273407

 

Here's some performance idea's I did on my 06.


http://www.r1-forum.com/forums/showthread.php?t=297858&highlight=




.

 

Full exhaust, PC3, Vstacks, Race filter and -1 in front. You'll feel like you just bought a new bike. Mid Range will be incredible

 

You're in Po-town?

Skip all that crap, buy a set of leathers, and come ride with us at the track (and some of the double secret spots we have here in the Hudson Valley).

 

Im down man. always wanted to get my bike on the track. and im over down in lagrange and always itchen to ride. i got a good leather jacket jus have to get me some pants.