This came on my last bike, not sure why as DEP fits without it.

Is it for an FMF or something else......

If this is a collar mounted on the exhaust manifold on the cylinder then it's to fit a Procircuit expansion chamber.

Can't see image though .

image is clear to see, anybody else have a problem with seeing it

I can see it now . It is what I described above.

Isn't a pro-circuit one, but could be off an FMF. Unless someone's fit a CR exhaust on?

Isn't a pro-circuit one, but could be off an FMF. Unless someone's fit a CR exhaust on?

Its a pro circuit! I have got one one mine

Doesn't look the same as my pro-circuit one.

Doesn't look the same as my pro-circuit one. But could be.

FMF don't have one.

Maybe Procircuit changed their design but they are the only maker I know of that uses a collar adapter to take a spring mounted exhaust.

My original PC one (on the right) is similar, on the left is the slightly longer one I had to have machined. It seems that Mark's has 2 groves for the O-Rings, I did quite a bit of research into this at the time (while ago now). Pro-Circuit don't seem to run an O-Ring, not on their CRM exhausts anyway. I thought FMF also did the flange/collar type? I nearly went with an FMF gnarley.

http://i26.photobucket.com/albums/c122/ ... CF1735.jpg

FMF don't have a collar. Not the last time I looked at mine anyway ...................................... .

The Procircuit one has a longer tube attached on mine, but it's similar...