Yes the Denali exhaust is true dual all the way to the muffler so my recommendation is to buy American Racing or Kooks headers which replicate that and fit exact. Then you just need to have a muffler shop run 2 pipes from there back, incorporating 2 separate mufflers. That way with the headers you’re all the way back to just in front of the rear tires plus they sound badass. I don't have pics of the stock exhaust but here's my AR headers. They fit perfectly on my 02 Denali. I have a dual-in single-out Aero Turbo muffler with a single pipe for the last few feet where it goes up over the axle but like I said you could run 2 pipes and 2 mufflers. The biggest problem is those last few feet unless you do away with the spare but if you're running huge tires like you want, a regular size spare prolly isn't any good to you anyway. BTW why is there a chicken on your head in your avatar pic?
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