Just put CF Yosh on!
I have always known that when it came to puting a pipe on my bike, it had to be a carbon fiber yosh! After looking around at many different sites, i found that morepoweracing.com had the best prices by far. I went with the carbon fiber tri-oval yosh. They only making CA models now, so it also came with a plug for the O2 censor whole.
Pipe looks abosolutely gorgeous! Goes perfect with the black and silver paint job on my f4i...i also have some other CF pieces. Installation was a joke. Litterally took me only 15 minutes!
Here's the thing though, i believe i even received the race version(ie: no "zyclone" baffle), yet this pipe is extremely quiet? It is a little louder, and sounds great...just not what i was expecting. I'm thinking maybe it will get a little louder as it "breaks-in" so to speak, but i really am a little dissappointed. My friend has an R6 with the Round version of my pipe and his is way louder! I'd really like to know why this is...
Also i started my bike up when the stock can was off...man it sound just plain nasty!! But i'm sure bottom end would've sucked and the cops would of been all over me haha.