The down pipe is full off honeycomb more restriction , I like replacing it, and exhaust bolts and clamps suck, was much easier to just replace the whole thing, I have heard great things about EFI live , have never used it though, have used some edge products in the past and have had good luck with them as well, my reason for the mini maxx is it is easy to use, you get 4 gauges built into to the unit, can choose what you want to monitor, you can get the tranny tune , I think is a must, and it is very easy to go in and set your desired defuel parameters, install is very easy . And mounted in the right place very easy to adjust on the fly. And idea of it installedmini max.jpg