Isn't the cat warranty longer, like over 5 years?

"julio" <j_fuentes66@yahoo.com> wrote in message
news:794ffa68.0308261127.767e051f@posting.google.c om...
> I got the dreaded code P0420 stating the catalytic converter is below
> threshold efficiency. I have one of those stupid manifold/catalytic
> converter one-piece units to the tune of $500+! Has anyone replaced
> this setup with an aftermarket header and under-the-car converter that
> is still emissions legal? Can you lead me to the parts? Do the parts
> from an earlier model fit?
> jf