Bringing the Cat back...enough is enough.

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bucket

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Well damn. Looks like I've missed a real sh¡t show, huh? I don't know what it is all about just yet so I don't know where to point any fingers... but in the mean time, the current off-topic argument needs to not go any further past this point. No more at all. Period.
 
Old77

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I've gone through and cleaned this thread up so that we don't lose a good thread because of some idiots. With that said, if this thread turns into a shi%t show again people are going to disappear from the forum.

Last warning.
 
SquareRoot

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HotWheelsBurban said:
Good job, gentlemen, let's all try to remember to behave like reasonably responsible adults.....
Click to expand...
Well now that @Old77 cleaned up the thread I probably lost my status for "most viewed threads" for the week :( It's the little things in life...Lol.
 
bucket

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Old77 said:
I've gone through and cleaned this thread up so that we don't lose a good thread because of some idiots. With that said, if this thread turns into a shi%t show again people are going to disappear from the forum.

Last warning.
Click to expand...

There you are picking up my slack again! I fell asleep instead of fixing it all last night, lol.

Good to see the corn sifting post remains, I got a real kick out of that one :rofl:
 
brooksman9

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Any particular Cat recommended over others?
 
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I do not know enough to recommend a specific brand. If I had it narrowed down to a couple of choices,and no other criteria, I'd buy a high flow cat, the one with the highest shipping weight. Stands to reason it would have more content,whether it is the actually catalyst material or the casing wall thickness.
 
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I just had to make this decision for my kids Camaro.
There are the super cheap ones on Amazon, I don't put much faith into them actually doing much at all to scrub the exhaust.
I spent some time looking over the interwebs and ended up spending $126 on a Magnaflow that is robust and has a much thicker core than the cheapies on the Amazon.

I also noticed that the Magnaflow I picked had a "EPA Compliant" rating on it.
I took that as meaning it would actually perform a service other than making it so that I could pass a visual inspection...
You must be registered for see images attach

The center of the cat body is the actual width of the material, unlike the ones online that are supa cheap.
You must be registered for see images attach

Now, I haven't completed the exhaust yet so I have yet to see if it actually works and passes the DEQ sniffer test.
This is just my recent experience with having to purchase a fresh cat for a car.
You may have a totally different experience than mine.
 
Ken B

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Good Read....
I am gonna do a cat. just wondering if its duals?
My son is trying to talk me into ceramic headers, stainless exhaust , duals, no cats.
This is a truck not a racer, he had a 9.6 second 392 charger w NOS.....the old man wants a good quiet exhaust the lets the motor breathe as much as is needed.
duals or a 2.5 inch single????? your thoughts /experience?
 
squaredeal91

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Ken B said:
Good Read....
I am gonna do a cat. just wondering if its duals?
My son is trying to talk me into ceramic headers, stainless exhaust , duals, no cats.
This is a truck not a racer, he had a 9.6 second 392 charger w NOS.....the old man wants a good quiet exhaust the lets the motor breathe as much as is needed.
duals or a 2.5 inch single????? your thoughts /experience?
Click to expand...
I'm always about duals myself. But a 2.5" single seems a little small maybe 3" single would be better.
 
SquareRoot

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brooksman9 said:
Any particular Cat recommended over others?
Click to expand...
Magnoflo. I did a LOT of research when I put this together. See post 41. I'll try to dig up the part number for that cat. It was slightly different from the rest in that it is CA rated. All that means is it has more catalyst and cleans the exhaust better than the same non CA version. Still a high flow unit.

Some pitfalls to avoid. It needs to be hot to work. The hotter the better. The closer you can get it to the Y-pipe flange the better. My first Y-pipe was 2-1/2" diameter. Big mistake. It shed heat way to fast, I remade it with 2" and the difference was noticeable. Ceramic coating or wrapping the Y-pipe would also help. Since I shi*t canned the headers and used the Holley Manifolds (ceramic coated) it solved the issue.
 
Last edited:
SquareRoot

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Ken B said:
Good Read....
I am gonna do a cat. just wondering if its duals?
My son is trying to talk me into ceramic headers, stainless exhaust , duals, no cats.
This is a truck not a racer, he had a 9.6 second 392 charger w NOS.....the old man wants a good quiet exhaust the lets the motor breathe as much as is needed.
duals or a 2.5 inch single????? your thoughts /experience?
Click to expand...
Dual cats on long tube headers isn't gonna work well if at all.
 
SquareRoot

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The other very useful thread on this topic:

Playing with hookers today. 10 out of 10!

Removed my 2.5 dual exhaust today. Exhilarating! Mounted the new Hooker manifolds and immediately felt this was one of the best mods I've ever done to a vehicle. These things are bad-a_s_s. 1. No more "special" tools to remove sparkplugs. 2. No more burnt plug boots 3. No more dropping the PS...
www.gmsquarebody.com www.gmsquarebody.com
 
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