I don't think anyone has purchased a set as there are no numbers to show performance gains on the NA engine. If you are going for a TTS system, they would be perfect for your planned application. Help the group out and purchase a set, get before and after dyno test and let us know if their claim of HP increase also applies to the NA engine.
tbh - there is really only ONE PART of the TTS pipe that is "interesting" for NA engines. the triple O2 sensor-ports for fine tuning. And those I suspect are only any use to the Dyno Gods or @Claviger . Power Commander and 3 Autotunes. Hmmmmm!