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rear cat delete 03 4.6 f150

   
Old Sep 17, 2009 | 09:52 PM
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rear cat delete 03 4.6 f150
please only answer this if you know what you are talking about. what are you supposed to do with the o2 sensers when u cut off the rear cats? i dont want to buy simulators and i dont want my check engine light on
 
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Old Sep 17, 2009 | 10:05 PM
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by the way the rear o2 sensors go directly into the rear cats
 
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Old Sep 17, 2009 | 10:12 PM
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you should gut or cut the front ones, then leave the sensors and rear cats alone if you want no troubles with a CEL coming on
 
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Old Sep 17, 2009 | 11:01 PM
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search is your friend
i just posted a thread about this asking the same questions
 
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Old Sep 17, 2009 | 11:03 PM
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i would cut the pre cats and the rear cats out, and install 94106 magnaflow high flow cats. Put the 02 sensors AFTER the cats to avoid get a CEL.
 
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Old Sep 18, 2009 | 11:33 AM
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Have the rear O2s re-mounted in pipe, and deal with the CEL, or do it the right way and replace the rear cats with Magnaflow 94106 hi-flow cats and re-mount the sensor after them.
 
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Old Sep 18, 2009 | 07:46 PM
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I think migdaddy has a great idea but when i cut out the front cats what am i supposed to do with those o2 sensors? if i remember right they are after the first set of cats.
 
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Old Sep 18, 2009 | 11:04 PM
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no they are before the pre cats. they measure the air:fuel ratio.
 
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Old Sep 18, 2009 | 11:09 PM
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Originally Posted by migdaddy
i would cut the pre cats and the rear cats out, and install 94106 magnaflow high flow cats. Put the 02 sensors AFTER the cats to avoid get a CEL.
This is what I had done and there has been no CEL on my truck. High flows on for over a year now.
 
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Old Sep 18, 2009 | 11:41 PM
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okay thanks for yalls help i really appreciate it.has anyone heard slp loudmouth 2s on a 4.6? im thinking of running an x pipe with two of those
 
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Old Sep 18, 2009 | 11:53 PM
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Originally Posted by ridinmudddy
okay thanks for yalls help i really appreciate it.has anyone heard slp loudmouth 2s on a 4.6? im thinking of running an x pipe with two of those
heres a couple videos. it will be loud, raspy, and very aggressive sounding. i would do it
 
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Old Sep 19, 2009 | 01:06 AM
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where are the videos i dont see them?
 
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Old Sep 19, 2009 | 01:13 PM
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Mig must have fell asleep

http://www.youtube.com/results?searc...rch_type=&aq=f
 
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Old Sep 19, 2009 | 03:04 PM
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ha sorry guys. i just finished my 5th 24 hr shift in a row. Ive never been this tired in my life. wewwww
 
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Old Sep 19, 2009 | 03:42 PM
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Originally Posted by migdaddy
i would cut the pre cats and the rear cats out, and install 94106 magnaflow high flow cats. Put the 02 sensors AFTER the cats to avoid get a CEL.
I agree and plan this also....
 
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