Quote:
Originally Posted by KillerBMotorsport
Keep in mind taking out your cats will do you little good unless you get tuned for it. You car's exhaust will also stink, which turns a lot of people off from going catless.
I'd recommend a high-end performance cat. Newer cat technology is W-A-Y better than it used to be with minimal performance losses. You won't have to deal with a check engine light either.
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Installing an aftermarket primary cat is no guarantee that you won't get a CEL. A tune is always recommended. "Usually" the tuner will disable the P0420 function. Now a days, I not sure of the legality of that action.