CAT Removal
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Senior User
Joined: Jan 2008
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CAT Removal
Okay! I have decided to take out my plugged CAT from my 97 F350 PSD. I have read alot of the other posts about how to unbolt and remove it but wouldnt it be easier to just cut it out just past the CAT on both sides and then replace with pipe? Any thoughts? We dont have emissions here so I just want it gone. Also, what are your thoughts on where to get a good set of guages?
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
Unbolting the CAT from downpipe is easy, however banging the CAT from rear exhaust pipe is nearly impossible with the age on these trucks. I did it once but never again. IMO chop the CAT out and go from there.
New User
Joined: Jan 2009
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I cut my cat out tonight. I cut right on the edge of the cat, not much straight pipe on either side so cut wisely. Took a 12 inch piece of 3.5od pipe and welded 3.5id adapters on either end. Removed cat back exhaust from hangers so that I could slide the exhaust into the new pipe (left in hangers the tailpipe would hit rear tank). Once adapters were over original exhaust on either side used 3.5in clamps to attach everything. Hardest part was removing exhaust from hangers.
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Senior User
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okay thanks. BTW where should I go to get a good set of gauges? I would like a pod of 3 in one.
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Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
its 3 1/2" ID. and you might as well take out the muffler too, the sound id awesome, the fuel mileage is awesome and best of all, the chicks dig it. get a piece of pipe and weld it in. i used a mig. absolutlely no regrets.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
You could even tack weld a piece of straight pipe through it to smooth out the flow.
Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
yes, but what's the point unless you live in an emmission state.