I am thinking about gutting my cats on 2000 F-150, I know they make a dummy O2 sensor for the mustangs, is there one out for a F-150, or will the one for the stangs work on my truck.

 

Why do you want to gut them? You know its a federal offense to remove or tamper with them, correct?

 

yeah its an offense but what they dont know wont hurt them. the government is gettig to far into our personal lives anyway.

 

O2 sensors are all basically the same, heated and non-heated, 18 mm. threads, almost all the same value ranges. I imagine a dummy sensor from a Mustang would work, might have to splice the harness instead of using the connector. If that is the case, I would go to a junkyard and grab enough harness material to make a custom cable without cutting my own OEM harness.

 

If your cat is working ok, and isn't plugged, there is NO advantage to gutting it!! There are only disadvantages.

 

yeah I know it's illegal, but they don't seem to mind here in small town,KY. I figure one more gutted cat won't hurt nothing. I did it on my 94 F-150 5.0L, Ijust want something louder on my truck(2000 F-150,5.4L). I ve messed with all kinds of setups on it and I can't get it any louder. I have Borla muffler, dual exhaust(not true duals) on my truck. I'm thinking of just running true duals H-pipe without a muffler, from the cats back and leaving the cats alone. I don't want something obnoxiously(sp) loud, but I wnat to hear it and I want a good tone. I want to either to that or gut the cats and keep the Borla on there. I'm not bad person for gutting the cats, just want a louder sound, ya know, hope ya understand. Thanks. Any suggestions would be appreciated.

 

You wil definatly get more sound by gutting your cats , I emptied mine out last week on my 97 5.4 , gave it more of deep rumble
I have a 50 series flowmaster muffler with dual pipes out the back. sounds good I think

 

1ton,
did you do anythinG with your O2 SENSOR, HOW IS YOUR BOTTOM END POWER SINCE YOU'VE DONE THAT? THANKS.

 

wrenchman
I am going to install MIL eliminators on my o2 sensors(just came today so I havn't had time to put them on yet)
As far as bottom end power it feels almost the same as it did before.

 

where abouts did you get your mil eliminators

 

mil eliminators? mother in law eliminator? Wonder if it works on ex MIL too?

 

mil means check engine light

 

MIL eliminators... Is that the only way around the oxygen sensors? Is that what they have on the mustangs or do they have something else?

 

The best way around it is running a tuner, which leaves the sensors untouched and working, but just ignores them. To be honest though, really why mess with it. The cats really don't hurt performance much, the engines cam, timing, and fuel curve is all designed around them being present, and real world tests and studies have shown that the difference between running stock cats and no cats can be as little as a 5 hp increase at its peak, which would only be noticed at high RPM, if you can even tell. About the only thing that removing them will do for you is more sound. Your economy will be pretty much unchanged, and probably worse.

If the cats are plugged or failed, thats and indication that you have another problem. A problem that is robbing power and economy. If the cats are plugged, then you would need to do something about it, and your solution is up to you, but I don't see a point in messing with otherwise functional cats. I don't see you stripping off your evap or EGR systems. If its not broke, don't fix it, especially not if fixing it means breaking it.

 

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