Mikedizzle
New Member
Just wondering if anyone has ever gutted a 4" hi flow cat before and what i exactly I have to do? Looks like this
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Gutting a magnaflow 4" catalytic converter?
- Thread starter Mikedizzle
- Start date
Will L.
Well-Known Member
People pay decent $ for cats for recycling the rare metals in it. Might be worth it to check if someone there will buy it. Buddy of mine here in vegas just got $100 for it and the guy did it for him once he told him it was a off road only truck.
Mikedizzle
New Member
I don't wanna sell it, I want to gut the internals. I need the body for emissions
Run it as is. Won't hurt anything till it starts to plug up. Takes a couple years anyway. I would put the cat closer to the turbo than 6.5 factory as the cooling from the factory location helps plug them up. Note how close modern stuff is to the engine vs. a 6.5.
The spun metal innards will not gut easy.
I run the ATT with a 4" duramax DOC kitty with decent results.
The spun metal innards will not gut easy.
I run the ATT with a 4" duramax DOC kitty with decent results.
tanman_2006
Just a farm kid...
Would a bullet style resonator work maybe?
- Staff
- #6
Diesel cats don't contain the precious metals that gas cats do. An average gas cat is worth $50-150(unless it's an import, they're worth $$$), the average diesel cat is worth $5-15.
Mikedizzle
New Member
Is it hard to break up the internals of a cut without cutting the top open?
Chevypoor
Active Member
Not saying I have ever done this but when I have "seen" it done I thick steel rod and couple of wacks with the BFH and your through. After the initial few times the rod comes through is a bit of work and then the rest crumbles. This was on gasser cats... never seen a diesel one gutted... just thrown in the scrap pile!
My understanding is the Dynomax high flow cats are the best you can get for not impeding exhaust gas flow. Some of the info on gassers I have seen surprisingly indicates almost no flow loss.
My understanding is the Dynomax high flow cats are the best you can get for not impeding exhaust gas flow. Some of the info on gassers I have seen surprisingly indicates almost no flow loss.
The above BFH works on ceramic cats. A spun metal cat like you are asking about will 'bend' rather than shatter.
Again I would run it as is. You will have a hard enough time with emissions as is and proving that the small bump is a cat not another muffler.
Value of scrap/failed/etc cats:
http://www.sellyourcatsdirect.com/dpf-systems/#duramax
Again I would run it as is. You will have a hard enough time with emissions as is and proving that the small bump is a cat not another muffler.
Value of scrap/failed/etc cats:
http://www.sellyourcatsdirect.com/dpf-systems/#duramax
Mikedizzle
New Member
I've ran it thru without the cat and it passed everything except the "visual cat" inspection. I put the cat on then it then they just looked with their mirror and passed me.
Mad Maxx
See, what had happened was...
Just put in a M090362 Donaldson 4 Inch Resonator. Looks just like a Cat, but it's Straight Through.
turbovanman
I has boost, :O)
I would run a resonator and keep a pic of the cat in your truck so you can "PROVE" its a cat, or simply get some cat heat shields and weld those on some pipe.
The cat you list is probably stainless and very hard to gut, I had to gut the rear cat on a Stealth TT, its stainless, took me 2 friggin hours, :mad2: If you must do it, find an OE cat and straight pipe it, hollowing it out produces weird gas flow issues. Aftermarket cats around my area get me $5, diesel cats around $20-40, OE gasser cats range from $50-200.
The cat you list is probably stainless and very hard to gut, I had to gut the rear cat on a Stealth TT, its stainless, took me 2 friggin hours, :mad2: If you must do it, find an OE cat and straight pipe it, hollowing it out produces weird gas flow issues. Aftermarket cats around my area get me $5, diesel cats around $20-40, OE gasser cats range from $50-200.
Get you some cat stencils and paint on there if you want to be a smart A$$ :hihi:
Mikedizzle
New Member
So I gutted it today, only took me about 25 minutes so it wasnt too bad. Just gotta get the piece I cut out welded back on tomorrow or the next day.
Mad Maxx
See, what had happened was...
Just remember to put that side facing Up so no questions get asked as to why it looks like it does.
Mikedizzle
New Member
Yup yup
C20ELEPHANT
Member
Forgot about this site, I used a 4" Donaldson resonator in place of the cat and just recently passed the opacity and visual (Az) for the cat in place, close fit to the cab. Ran it for awhile with just the resonator and a little to loud for me, just recently installed the muffler before inspection much quieter to my liking.
Mikedizzle
New Member
Yea I was gonna buy one of those bit I ended up just gutting my cat instead of spending the extra money. But I had a bit of bad luck the other day, oil pump went out on the i10 and i17 interchange. Now I've got a nice knock in my motor. Ugh