I'd have to see this one to believe it. If this is true I'd have to say you either A. live in a place where cops really need to find things to do because they aren't busy. or B. pissed some cop and/or politician off real bad.

 

A comment from a "know it all" I see.....I don't understand your skeptisim or usefulness in posting about it. Nor do I care. There are things that happen in this world that even you do not know about and don't require your validation to be true. It 's not like stated I went for a ride on a UFO. Simply put, some oil change shop douchebag whom I didn't **** off or even know noticed my headers and lack of cats and reported me to the DEC. The DEC Environmental Crimes Unit was required to investigate the complaint and then upon finding a probable violation was required to prosecute. Your state has the same laws and same requirements. Simple as that. Took a whole year to get settled. If you would like more info let me know in a PM in order keep your useless opinion from clogging up this thread.

 

So am I correct to assume if it comes stock with a CAT you shouldn't delete it? I know my 2005 F-650 with a 7.2L cat; the exhuast goes from the turbo to the muffler and then out. No cat involved. But, my 04 f-450 and 06 f-350 have the CATs from factory. They are all involved with the USDOT regulations. Maybe I should put my CAT back on my f-350...

 

Speaking of something useless... I just read something from a waste of oxygen. Take a valium. So an oil change flunky just decided out of the blue to call on you for no reason. Ok. Good luck to you.

 

Legally that is correct Al. If you look under your hood on the core support sticker, it says "catalyst." If it does say that, you're legally required to have a CAT.

 

I am putting my cat back in, i just got done taking it out but i think it really needs to be there. i'll leave the muffler delete pipe in because i'm not sure how tog et that back on without welding. since it's cut so close to the muffler.

 

In all honestly, as far as true effectiveness the cats that are in the 6.0l don't really do as good, up until the 6.4s, the exhaust system for diesel trucks was just to do the bare minimum to satisfy epa standards. There are no sensors, and when I took mine out, no dtcs, it was just like it was thrown on there as an afterthought. As far as the noise citations, that depends on the area that your in, I hear half-ton trucks and cars that sound a whole lot louder then my truck at city speeds, so around here if you get a loud exhaust citation, it's going to be in conjuntion with something else that they pulled you over for(atleast here). Only time mine sounds really loud, and I'm willing to bet it's the same for other 6.0 people unless they have done different mods to the exhuast, is when I'm rulling pushing the pedal in which case I'll probably be pulled over for speeding first and then maybe written up for the loud exhuast. Really, the one time you have to worry about getting written up for no cat is emissions testing(which here I'm exempt due to sticker weight being high, but there are still a few places were diesel accross the board is exempt), however, here it is just an OBD testing for all OBDII complaint vehicles, since pre 6.4 don't have sensors, you can pass(and people have) even without a cat. However, they get you if emissions testing includes physically testing the emissions at high and low idles, plus the OBD testing(like they do in Dallas, or atleast they did). Now if you have a pre-02 truck(I believe that is the year, might be a year or two earlier) you didn't come with a cat and therefore, aren't subject to quite the same regs. I just don't think the cat is effective in pre 6.4 or equilivant engines as people make it out to be. Even though I have no cat on this truck, I probably would leave it on future trucks as they are going to be intregrated with the vehicle like they are on cars. I would also like to add a caveat to this and that is this relates to where I have lived or currently living now, I can't vouch to say if this is applicable out to California(I know they have one of the strictest, if not the strictests, emmissions policies out there), but I'm willing to bet that MOST experiances will be like mine.

 

i actually, don't like the HISS sound i get at idle. i'm not sure if that is due to the muffler being gone or the cat being gone. I have a good friend who I respect a lot as a very good ASE mechanic and he also owns several 6.0 truck that he uses for work, as do I, and he recommended that for backpressure, I shouldn't have touched a thing.
I eventually want to do a CAT back system as to not let ford have a reason to deny me if i have a turbo or engine failure someday and they said I touched the downpipe and cat. to be safe, I plan to put the cat back in. My friend said that the engine needs backpressure. I have read on this site that it really doesn't do anything for these engines by having it in. so to be honest, I'm torn as to what to do
I liked the sound at idle prior to deleting the cat and muffler, since I did both at once, i'm not sure which one creates the HISS and which one doesn't. ilove the sound while going down the street and especially if i do get on it a little and take it up to 2500-3000 rpms. even at like 15-25 mph, it sounds like a low rumble and better than stock. so from taht stand point. i am very happy about the sound. i just think the cat being put back in will keep me safe from a potential fine someday, ya just never know if a cop is going to give you a hard time, even though i am very conservative when driving and i'm not a young wild kid anymore. since this is registered commercially for my business, I'd hate to get busted for just having the cat out. i'm sure the muffler delete by itself will make great sound and keep the dealer happy.

I wish that MRBP made a CAT back system with 304 stainless. i only see the 409 systems or aluminized.

 

That is from the cat delete, I have a high flow muffler on mine and I have that hiss, unless from the nature of the high flow muffler allows that hiss to happen as well, but I believe it is from the cat removal.

 

another option is just gut the cat. It's still there, but just an open pipe! At 9000 miles I couldn't see any light through mine at all. Just get a vise, a bar with a somewhat pointed end and a BFH to beat that bar through the cat.

 

is warranty voided if cat is deleted?

 

i don't think dealers like it much when you remove it, plus, it's federally mandated to be there, if it was originally put on the truck from the factory.
i can still see through mine and i have about 10k miles on mine.

 

If the dealer sees it then your exhaust warranty will be voided if they noticed you don't have a cat, other then that no.

 

i was wondering if your turbo blew and they realized you had no cat, isn't there a chance that some dealer might try and give you a hard time for altering the truck?
just throwing out some whatif's that's all. not trying to take sides of the dealers or ford here.

 

They would have to be able to link it to your mods. If it was a turbo they would look for an aftermarket intake or maybe a tuner. I have had warranty repairs done and my dealership knows I run a no cat exhaust, tuner, and the only thing they said that they couldn't fix under warranty was the exhaust(which in the grand scheme of things is probably one of the cheaper fixes there are). However, I also haven't had big ticket repair work done either, but I am a good customer of theirs as far as getting new vehicles in a predictable timeframe and having my maintance work done there as well, so I think they cut me a little latitude, plus I was also upfront with them, that goes for more then what people seem to think that it goes for.