[cdub2010]

I used the speed engineering swap headers with a 2.5 inch stainless bend kit. I cut and welded up my exhaust with Summit racing 409 stainless 2.5 mufflers 14 inch long i believe and 3" flowmaster prebent tailpipes on my '77 k20 5.3. I didnt put in a x or h pipe, just true duals, because I was in a hurry to get it done. It sounds fine, gets noticed with the stock cam but it think its a bit loud at wide open. I dont think ls engines sound have a good sound anyways, so its all personal preference.
It cruises nice on the highway at 80, no drone or buzzing. Ive done 600 mile trips several times and its quite enough for what it is.