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Discussion Starter #1
Just want to verify that the stock exhaust has two cats, and where do they meet back up before going back into the stock muffler?

I bought my truck with exhaust already installed with a dual in dual out magnaflow and it looks like newer piping all the way back to "two" cats and just trying to see what it was stock before I go and change it. Am trying to get back to just a single exit but not sure if I want to Y it into a single.

Anyone with a 6.2 NNBS chime in. Thanks.
 

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I think it's one cat per side, is that what you mean?
 

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boogity boogity
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Y right after the cats, single in single out muffler. All of the stock piping is 3.5" after the y, it's also all under the passenger side.
 

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Discussion Starter #5
Y right after the cats, single in single out muffler. All of the stock piping is 3.5" after the y, it's also all under the passenger side.
Ok. See thas what I was thinking I was pretty sure it was single in single out but the cats are def factory. Makes since thanks.

Now the real question should I Y it back and do a si-so or do a dual in skngle out? Im thinking y and si-so.
 
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