[Aussie Mike]

If you are a handy fabricator and have the tools then like Simon said, "build them yourself".

I built my own complete system. There are cats inside the sidepipes and they strip aparrt so you can re-pack or change baffles. I've got a couple of different baffles. One quieter set with cats and another free flow set without cats.

My headers are 1 7/8" and they step up to 2" at the flange where they connect to the side pipes. The bends where they come out of the guards are 2" and they run into a 3 1/2" collector. The muffler body is 4 1/2" tube and the tip steps back down to 3 1/2"

There are a few pics of them in my gallery.

Cheers

Edited for spelling (fat fingers)