I have a built thread going but I hav'nt added to it lately "Re-start project cafe"
It was much easier to build than I thought it would be. I just had some bends made at local shop, cut to fit, and weld.
The pipe is 1-1/2 ID so it is very large for a 550 and I am sure it will breath well ,and with a little tuning sound wicked. The mufflers were an after thought, so they may need to be packed with some glass or opened up, time will tell