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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 · #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.
 
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 · #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.
 
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