Exhaust diameter question
 

Just a general question about the quoted exhaust diameter, ie, 45mm/50mm, is this the internal diameter or external diameter of the connecting pipes?

Also has anybody fitted either Gianelli or Akrapovic exhausts, if so whats your comments against Termignoni's if any. Thanks

Generally pipe specs are quoted for internal diameters.
Thereafter the schedule comes into place, and this refers to its pressure rating, however with thin walled exhaust tube it doesnt really have any significance

Had an Akropovic on a Suzuki I had......absolutely stunning workmanship! It's where my hard earned would go.....

mmmmmmmmmmmm! nice avtar pvw10.