there are countless gasoline vanagons running with a hollow cat.
Doesn't hurt anything ..
though a hollow cat does not flow quite as well as a good cat or a
straight pipe.
I wouldn't say the difference is enough to notice even.

On 3/18/2012 8:54 AM, marc rose wrote:
> I went to change out my worn out and rusted muffler on my 90 Carat "Rosie"
> yesterday and noticed that the converter was all busted up and the ceramic
> is all but gone.  I live in an area that has no enforced emission tests or
> anything like that. My question is can i can safely run without the
> convertor.  I was going to just bust out the rest of the ceramic and
> reinstall but was not sure how it would affect the overall operation of the
> engine.
>
> Any thoughts??
>
> Thanks
>
> Marc
>