y pipe and cats

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Oct 29, 2006 | 08:45 PM

worldindustrie7

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Joined: Oct 2006

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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?

Nov 13, 2006 | 09:26 AM

payableondeath6

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Joined: Mar 2004

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From: Columbus, OH

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.

Dec 9, 2006 | 10:10 PM

swavet22

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Joined: Jun 2006

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If you change the cats is their anything you need to watch for so the sensors will still read correctly ???

Dec 10, 2006 | 07:00 AM

TSDan

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Joined: Dec 2005

Posts: 406

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From: Chicago Area

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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