CAT Removal
Posting Guru
Joined: Jun 2005
Posts: 1,268
Likes: 8
From: central Louisiana
on the 2000 model there are 2 O2's, one at each header collector. there are none right before, or after the cat it's self. with only upstream O2's the reading are coming from the exhaust gasses right as they leave the exhaust. so there is no after cat reading to tell the computer that the exhaust is unrestricted.
might notice a slight decrease in gas mileage due to the lack of a small mount of back pressure, but then again it's been proven on here that the large factory cat has little effect on back pressure.
Posting Guru
Joined: Jun 2005
Posts: 1,268
Likes: 8
From: central Louisiana
this is a common misconception about newer vehicles. in fact it was done on the new eco boost where they froze the engine then ran it and froze it again to imitate extreme temp conditions in short times. there were no valve traine issues.
i've ran open headers in a race truck in NC winters when mud drag racing, and never had a warped valve, as well as many other racers have too.
lets keep the old mechanic urban legend tales coming, this could get interesting........
Post Fiend
Joined: Oct 2003
Posts: 6,949
Likes: 1
From: utica il
just remember to take it down to the local scrapyard when you cut it off. a big truck cat is probably worth $75-150 depending on size and precious metal prices.
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Cargo Master
Joined: Jul 2009
Posts: 2,885
Likes: 25
From: Chino, California
FALSE
on the 2000 model there are 2 O2's, one at each header collector. there are none right before, or after the cat it's self. with only upstream O2's the reading are coming from the exhaust gasses right as they leave the exhaust. so there is no after cat reading to tell the computer that the exhaust is unrestricted.
might notice a slight decrease in gas mileage due to the lack of a small mount of back pressure, but then again it's been proven on here that the large factory cat has little effect on back pressure.
on the 2000 model there are 2 O2's, one at each header collector. there are none right before, or after the cat it's self. with only upstream O2's the reading are coming from the exhaust gasses right as they leave the exhaust. so there is no after cat reading to tell the computer that the exhaust is unrestricted.
might notice a slight decrease in gas mileage due to the lack of a small mount of back pressure, but then again it's been proven on here that the large factory cat has little effect on back pressure.
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Freshman User
Joined: Dec 2010
Posts: 40
Likes: 0
Also, in case anyone is wondering why I'm considering this. I will be doing the Y pipe up grade and it will be more costly to re-install the cat than to just run a tube directly to the muffler. I dont see spending the $ to install it when it doesnt help the truck.
Cargo Master
Joined: Jul 2009
Posts: 2,885
Likes: 25
From: Chino, California
I would hang on to it and not sell it. Who knows if your state may implement emission testing someday.
Here in CA, diesel trucks did not require smog testing. Just this year, diesel trucks are now required to be smogged for model year 98 and up. Those folks that deleted the emission control devices will need to put them back in order to register it. Just an FYI.
Here in CA, diesel trucks did not require smog testing. Just this year, diesel trucks are now required to be smogged for model year 98 and up. Those folks that deleted the emission control devices will need to put them back in order to register it. Just an FYI.
Post Fiend
Joined: Oct 2003
Posts: 6,949
Likes: 1
From: utica il
yep, they have platinum or something along those lines in them. wish i would have known that when i was 16, could've had a lot of cash from all the ones i threw out.
Posting Guru
Joined: Jun 2005
Posts: 1,268
Likes: 8
From: central Louisiana
You will have to check your specific year model to be 100% sure. I "think" they started the dual O2's in 2002. Just look at the Cat and see if there is a sensor before and after the cat. That is the best way to tell.
Senior User
Joined: May 2010
Posts: 471
Likes: 1
From: Pocatello, Idaho
Hello, When I bought my 01 F-250 V10 used from the dealer it didn't have a cat. Just a magnaflow muffler. I noticed in the summer when I would have the windows down and stopped at a red light that my exhaust smelled and would burn my nose, it stunk so bad. My truck also only has the two O2 sensors in the down pipes. Finally this summer I had a magnaflow high flow cat welded in and now the exhaust doesn't burn my nose. So that would be something else for you to think about. Also my state doesn't have emmisions, but I've been told by a couple mechanic freinds that my state will be doing them sometime this next year. So I would keep yours for the future, just in case.