Went with a Danville billet 68mm 4094avnt and a Danville billet S483. Still using my SDP piping. Wow. On a 2550 pulse tune with 60% is bad ass. Thing pulls so much harder on the big end. Drive presure is close to 1:1 with around 65#'s of boost so far. Still have the same tuning as I did for the stocker/ 475 setup. Still spools surprisingly well. I am more than happy with the setup and know there is plenty left in it. EGTs at WOT were around 1200*. The 483 comes up super easy.