I have the DCS 4 on my zilla and i am 100% satisfied with it. I think it's an awesome pipe for the trails.
^^ Watch his videos that quad rips around the trails!!
I included Mitch's DCS4 because it is a very good pipe. The videos show just how strong a performer it is. On the trails I'd bet you could get in and out of the trees quicker, those top end pipes perform best when you get to stretch it legs and and let er rip! I prefer the HPR19 for all out performance. I was there at both dyno testing days and the fishermans Zilla ripped all the others a new a hole.