Ok I know I said is was ordering the MRT v2's but started some thinking and that is where the trouble began! I am only talking about the LFX, with a no header option because of the head design. So I started doing more reshearch on this. Has any body used the Solo set up the their Hi-Flow cats. And how do they sound. I just bouncing ideas off of you members. This set up would maybe yeild a few more HP but not like having headers correct?