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y pipe and cats

   
Old Oct 29, 2006 | 08:45 PM
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worldindustrie7's Avatar
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From: North Wales PA
y pipe and cats
i have a 1999 f150 4.2L v6 reg cab and the both cats are bad and the y pipe is rusted. any ideas on some new cats and y pipe for it?
 
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Old Nov 13, 2006 | 09:26 AM
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payableondeath6's Avatar
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i'd go with some hi-flow catco cats (off ebay or summit racing). and if you have to have a y-pipe i think summit has a y-pipe too.
 
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Old Dec 9, 2006 | 10:10 PM
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If you change the cats is their anything you need to watch for so the sensors will still read correctly ???
 
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Old Dec 10, 2006 | 07:00 AM
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From what I read here the 4.2ltr. needs pressure so watch which cats and mufflers you get.They say it is not like a v-8 that likes all the flow it can get.Read more in the forums!
 
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