I have a set of used trinity stage 4 pipes but have never run them. I was told they perform a lot like t5's, but might pull a little higher into the rpm. Had planned on trying them before I blew up my motor. Now I went to a cub and bought some shearers. The nice thing about the stage 4 trinitys is that they are made of stainless steel, so no chrome to chip or flake/fade and they will stay looking great even if you ride at the beach like I do. My buddy has had a set for several years, and if you keep the silencers polished up nice, the pipes basically stay brand new looking. I think trinity gets a bad rep more from customer service than bad parts around here. I dont think that their stuff is bad, its just that you can get a lot more for your money elsewhere.