my 99 and my 97 both had cat
converters from the factory, I live in Denver metro area with California style emissions laws so I must keep the cat
on both of those trucks. Diesel testing is once a year here, what a huge worthless pain in the ass backasswards state this has become. Anywho they also want the cat
welded in, no clamps...trying to keep you from making a "test pipe" just for the once a year testing.
The computer on your truck has no idea there is a cat
converter, we do not have 02 sensors like a gas engine. If you do not have emissions DITCH THE CAT
its only robbing you of power and MPG
When you remove your stock cat
you may be able to sell it, I am not sure. Some of them are full or platinum and palladium so the cat
converters can be worth some good $$$. When I recently removed the one from my 97 I was surprised to see it is hollow...no precious metals in mine. I replaced it with a huge dodge 4" unit so I am emissions legal..... as far as they know, once a year.
The superduty will say on a big sticker under the hood if the truck has a cat
or is a non cat
truck...... my 97 has cat
, my 99 has cat
, my 01 has no cat
Huge waste of taxpayers money!!! The emissions program in Denver is a JOKE and has been for YEARS
Now CU Boulder just released a study.... "Diesels are polluting far worse then we originally thought".... when a Prius or a Tesla has a larger carbon footprint then a diesel Excursion...this place is so back ass wards I WANT OUT!!!!!
Pull your cat
when you install new exhaust, see if its full of a grey honeycomb material if it is = sell that SOB (you can take it to metal recycle yard and get $$$)