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Old 06-09-2010, 09:25 PM
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greendaze greendaze is offline
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Join Date: Mar 2009
Location: PA
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Vehicle: 2008 Dodge Ram 5.7 hemi
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Default How restrictive are stock cats?

I'm looking to find out what my next step in performance is going to be. So far I have a S&B CAI (boxed in kind) with a ram air hood blowing on it. I've also done the magnaflow catback duals out the back along with a superchips programmer.
My question is how restrictive are the stock cats? Does it make sense to replace them before I look into long tubes? Can I do long tubes and keep the stock cats? Does it make more sense to wait till I can ass both at the same time? I heard there can be O2 sensor probs when modding from cats on up, any truth to this? Any other suggestions on what to add? I know thats a never-ending question but what but what would you do next given my current set-up. Thanks for the help!
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