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Re: Mods on my GMC, a year later
I would do the headers, when you can. I did my 2011 GMC with a tune, CAI kit, Kooks Long Tube headers and 'Y' pipe, magnaflow muffler and dual 2 1/2" outlets on the exhaust. I also lowered mine 4" front, 6" rear and changed the side mirrors for a set from Street Scene. It runs great and works just fine. I now have just over 20,000 miles on it.
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Frank
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