Will a "spent" cat work on a gasser?


Veteran Member
Apr 7, 2006
Alexandria, VA
2002 golf
what it says.. I have 120k on a cat that I'm removing. This thing is essentially decoration on the diesel, but I'm thinking it may be fully functional if run for a while on a gasser.

The theory, although admittedly suo rectus, is that most of the blockage of a cat on a diesel is from soot. Given the temperature of a gasser exhaust, the soot should slowly burn off, leaving a functional cat. If it's useful, I'd sell it on craigslist or something.

(Meanwhile my own car will have a new 63 mm cat and a straight pipe exhaust cat back, from tt.)