Re: 147 Exhaust
I fitted a CSC exhaust to my 75 five years ago and then did c.50k miles with it
It lasted very well indeed. The paint lasted longer than with a normal exhaust, but it did flake off in the end. The shiny end stayed shiny, mainly I guess because I used to polish it! The note as stated earlier was a different pitch, slightly lower, but not boomy or annoying. The price now being quoted is about what I paid back then, so it is a real bargain.
So, I would say go for it! I will be doing so when the end falls off the 156 thats for sure!
Good luck, James