Yeah nice to know that hacking up the car was worth it for some HP. TBH I didnt expect the Gen3's to give anything after the UpRev, but appears they give a litte extra. I got them for free with the Stillen deal so it didnt bother me, other than the effort required to hack up the car a little. And the fact they need the bumper off to clean them every 50k miles (will do it more often though).
Dont tell G Man that the Akra might not flow as well as the Stillen, he may cry Lovely looking and sounding system though - you should hear it with G Man's HFCs