Steve I run the same one Mark does and to date I have 7500 miles on it with countless WOT runs, my egt's are around 1400-1500(depending) and I think Mark's are about the same, when I called them a few weeks ago they said it was best to have it 3 inches away from the heat source. It's $325. 00 and the flanges are $25. 00, if I could say anything bad about it I would give you mu opinion but I see no down falls to it yet, Some Vendors are using it also but no feed back from them yet. While chatting with them they said there was a 1 week back log on them but that might be fixed now!
Jim