Dan N <dn92610@GMAIL.COM> wrote:
> I have hear that without the CAT the O2 sensor won't work correctly because
> of lack of back pressure. If you really want to bypass the CAT the best
> solution is using an old CAT and partially gut it out then you will have a
> bit of back pressure for the O2 sensor. Just hear say I didn't try it...

Where DID you hear that?  Tell Ken Lewis who put a bung in the exhaust
of his 356 and uses the O2 sensor to tune his carbs.  Or all the cars
that use a second O2 sensor AFTER the cat.

Richard