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Discussion Starter · #1 ·
I remember when people were cutting them off vehicles and selling them for some pretty good money. Can you still do that or did they put an end to it?

Thinking about gutting my stock cats, but if I can get some money out of them ill sell them instead.
Even if you can sell them they are probably not worth much right now are they?
 

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i remember back when there was a big problem of cats being stolen. my dads old work truck got stripped of them (or 1?) his 02 rcsb 4.8. they still havent replaced them lol his friend has that thing now.
 

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just fyi, it is illegal to not have cats. large fine and possible prison involved IF you get caught. I know a lot of people run the risk, but i wanted to make sure you knew what you were getting into with that.
 

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Discussion Starter · #9 ·
just fyi, it is illegal to not have cats. large fine and possible prison involved IF you get caught. I know a lot of people run the risk, but i wanted to make sure you knew what you were getting into with that.
Ya that's why I was thinkng of selling the stock ones and getting aftermarket free flowing cats. Or just gutting mine to pass a visual inspection if I get pulled over.
 

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Discussion Starter · #11 ·
I know, but if I could get a 100 bucks a cat, I could buy aftermarket cats and still make money out of the deal.
 

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Does anyone have anything to prove this though?
There have been individuals who have proven this as well as a few magazines. There was a 6.0 build in one of the bigger magazines a few months back where there was like a 1-2 rwhp difference between stock and aftermarket cats.
 

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There have been individuals who have proven this as well as a few magazines. There was a 6.0 build in one of the bigger magazines a few months back where there was like a 1-2 rwhp difference between stock and aftermarket cats.

Pretty much from when the Vortec engines were rolled out (sans 1996) there have been minimal difference in OEM vs aftermarket. Before than with the TBI engines they didn't flow all that well. Nowadays though there's vitually no difference.
 

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Discussion Starter · #15 ·
Alright thanks guys, I guess ill keep them then.

How would I put them on my exhaust since im going to be putting LPP headers and Y on? Is it ok to put both of them on after the Y and before my muffler?
 

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No.

The fine for running catalysts in non-OEM location/configuration would be same as not running catalysts.

And FYI, if you're concerned with passing a visual emissions inspection, you shouldn't be looking at longtube headers.
 

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No.

The fine for running catalysts in non-OEM location/configuration would be same as not running catalysts.

And FYI, if you're concerned with passing a visual emissions inspection, you shouldn't be looking at longtube headers.

Why? There are plenty of header configurations out there that are 50-state legal.
 

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There have been individuals who have proven this as well as a few magazines. There was a 6.0 build in one of the bigger magazines a few months back where there was like a 1-2 rwhp difference between stock and aftermarket cats.
so an aftermarket high-flow cat will flow the same as a used cat? makes no since, I have a 95 yukon and mine will disappear as I'm fixing my transmision but just a pipe will replace mine and I'm sure it will out flow a oem cat.
 
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