What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Tonyrodz]

Personally, I'd keep saving and get the catted y-pipe AND a tune. I know, opinions and all. Had an open exhaust LS1 when I was 19 and it stunk so bad - that smell doesn't come out clothes easily. But, back then I did use O2 sims for the rears before I got it tuned.

I agree, especially if your state has inspections. I have the long tubes and y pipe with no cats on my 03, and the smell does get annoying. Get the cats.