I saw that about the cones the other day when I was on the soloatlanta forums. I can swing by summit they should have them in stock. I looked in the catalog at them yesterday after seeing that thread. I don't know how much they will quiet it down but it is worth a shot. The only thing with the disc insert is that it has to be welded in according to the info in Summit. They also are supposed to go into the collector on the header. I was by summit this morning getting a new AEM dry flow filter and didn't even think about checking on that part. As far as the ultra shield seat, I'm sure it is not very comfy but like i say if I can use it just for running and take it out for daily driving I think I could deal with it. Especially if it is as supportive as it looks. I will check into the rails if I decide to get it. I think I'm going to run this first one and decide from there how in depth I want to go for SCCA. I'm sure I'll be hooked!