Personally, I wouldn't run a set of Toomey's, if someone gave them to me, but that' just my opinion, because I think they are way over-rated. I used to run FMF Fatties, with and without a port job, and it ran great, but a lot better with the port job. Seems like most people don't like the FMF's, because they think a pipe has to shine like a diamond, to run good. My Fatties would hit like a mo-fo in the mid-range, especially after the port job was done. And remember, you will find a bunch of different opinions, on each question, but it's your decision, since it's your quad, and that's all that really matters. Do what makes you happy, and go on.