Catalytic Converter Query

[baz-r]

if any one is having to use a cat things to take into account are not all cats are of the same constrution and size. some cars have them fitted right at the manifold and some ferther down streem (cats need to be hot to work but not to hot to burn up)
also bikes are not cat tested in the uk so not sure if thay would be a test pass

i would try to take into account engine size/bhp, distence from cyl head for a start.