I would be interested to see a photo of Classic Lancias Aurelia exhaust manifold. They seem to do things properly.
I have fitted Bell complete s/s exhaust systems a few times and been pleased with the results ( a reasonable exhaust note without tininess which improves as the system gets it inner coating, Also no brittleness leading to cracking/splitting).
But the reality is a good mild steel system will always sound nicer.
Bell systems use a tubular manifold which looks nice but it does nothing to enhance breathing. To get a correct 'tuned length' Aurelia manifold I believe that the individual pipes extend almost under the car separately before merging into one. I have seen one at Gamberini in Bologna and my memory tells me that Cavalitto sell a 'special' exhaust manifold for Aurelias.
As an aside, my 1st series B20 which has a standard engine has a single side exhaust with special exhaust manifolds and down pipe 3 into ones , all in mild steel and it sounds great as well as seeming to breathe well......or is it an illusion because of the noise under the 'always open' passenger window?
Chris.
