I am concidering to buy the turbo back MBRP exahst system, I was not aware that diesel engins used a cat. converter. (I am new to F350s) Will North Carolina instections look for my catylitic converter? If I buy the exhast system with no CAT will it pass inspection?

I could but the CAT version and run the CAT delete, but I won't bother if NC state inspections will overlook the exhast.

OneTon4Fun

 

I have a straight system with stacks and have never had any problems, but my truck didn't have a cat to start with. Oh btw it's a tricked out built to hell 2000 powerstroke.

 

OneTon4Fun

What year model is you truck?

 

I have a 2003 F350 6.0

 

you will have to have it if you have a ********* inspector, but alot of guys just cut them off and chance it. there is a cat delete pipe that is made for your truck that can be installed and taken back out with bolts.this way you can replace the cat when needed.

 

I believe the 2008 model diesels are the only ones required to run with catalitic converters. I'm sure your 2003 doesn't need it. Did it even have one on it from the factory?

 

Oh, in response to your question, Is turbo back without a cat OK? Yes. Some guys run them with no muffler too. It is legal, at least in Ky. A straight piped diesel isn't as loud as some performance exhausts on gas engines. They do sound good too. Just try and be sensible and not pi#$ off your neighbors late at night, unless of course they deserve it.

 

You know, I really don't know if there is a CAT on my truck. I just see alot of talk about CATS when look at exhaust systems. I am surprised that a diesel engin uses a CAT coverter. Knowing my luck, I have the CAT. I will likely get the MBRP Cool dulas with the CAT and use the CAT delete pipe.


OneTon4Fun

 

I have a '02 F250 7.3. It did not come factory with a cat. I had a turbo back MBRP installed and absouluty love it! I may be wrong but I think Ford started putting cats on diesels in '03 (I think). My service guy at Hilbish Ford told me if my truck did not come with a cat on it from the factory then I was good on the vehicle inspection. I just need a safety not emission inspection.

 

It looks like in the state of North Carolina I will need to have a CAT if my truck came with one. I may have to get the exhaust system with the CAT and run the CAT delete pipe after I get it inspected.

 

since we are on the subject of diesels. was following one this afternoon after work and he had something going on. The smoke was white as paper, looked to me like he needed some oil. I dont know what exhaust he had but it didnt sound good IMO. I have a 351 with some 1 chambers that sound awsome. I dunno what 1 chambers would sound like on a diesel. Do diesels have an 02 sensor?? I know my gas motor does. And i think it is behind the cat.

 

The older diesels don't have O2 sensors. My 97 and the 02 don't have them. I don't know about the new ones. As for gas engines, the O2 sensor should be located in the exhaust pipe between the exhaust manifold and the catalytic converter.