Big pots low revs;and in my experience with the exhaust systems the 'can' has a 'diffuser'(perforated cone) inside at both ends where the branch comes in. These do fragment inside even when the can itself is sound.
No doubt this will increase the 'Boom'
Cessna 180 and an 0 470 = aviation heaven (especially with the larger wheels)
Last edited by POBJOY; 22nd Mar 2013 at 08:17.