I have had the one piece and the 4" two piece SE mufflers with the V&H TD'S,I thought the one piece were too loud which was a shock since there suppose to be EPA street legal,I bought them used and wondered if they were altered but they didn't look it.
I went with the V&H True Dual Headers because I liked the step up midway down the pipes and the SE's because I think no other pipes can touch the sound and performance. I am very happy with the combo!