Quote:
Originally Posted by Tanner
I think he probably meant this for the headers install.
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I don't think too many dealers would install aftermarket LT's w/ hi-flow cats for you..."technically" it's illegal to replace them (cats) unless they are defective. And after installing them you may require a tune (if you get a check eng light) which "technically" will void your drive-train warranty.
. If brought to a dealer, I'm positive they will try and talk you into buying the GMPP shorty headers.