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Has anyone tried gutting the cats?

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2.5K views 13 replies 10 participants last post by  Da Mayor  
D
#1 ·
I see this car has three cats on it. They have got to be restricting the exhaust flow. I'm thinking of getting a spare downpipe and gutting the cats to test out what kind of difference in horsepower and sound that would make.
 
Discussion starter · #11 ·
So have any of you done it? It sounds as if you're talking a lot of hearsay. I still think its worth a try to fab up some test pipes (without gutting my cats) and swap them in the see what happens. Good or bad, I'll let you know how it goes.
 
Discussion starter · #8 ·
I doubt I'll gut them, but instead make my own test pipes. This is just for the front two pre-cats. The rear one I'll leave alone for now. I've been reading around at 350Z-Tech.com and test pipes seems to be one of their favorite mods.
 
Discussion starter · #3 ·
I don't want to take any chances on voiding my warranty. Some dealerships can be picky @ssholes. That's why I only plan on doing things that I can bolt on/off. Also I don't plan on spending $400-500 on a Stillen or CE downpipe. I was simply thinking of getting one out of a junkyard and gutting it.
 
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