Very interesting as you certainly have gotten great dyno results. A lot of it appears to be due to using a ported cobra jet manifold, special throttle body, and an AED tune. I assume you used a dynojet dyno.
I have the same headers with the cats, stock manifold, and Bama tunes and can only manage about 380 hp. I have the kooks catless pipes purchased already but I think my car would get way to loud since it is pretty loud right now. I am tempted to find out what it sounds like and what my gains might be. And after that I am strongly considering an AED tune but not sure if he can tune with Diablosport tuner.
When my car had stock headers I already had the ported CJ Manifold, TB, intake, O/R H and axle backs.
The newer numbers were headers only and swapping to a different O/R H.
It was done on a Dynocom which is the same dyno AED uses which is extremely accurate.
I had some knock in mid-upper range. I'm hoping to go back with 100 Octane or higher and shoot for 450+ RWHP.
I respect Bama as a business, but, they have nowhere near the knowledge of 5.0's as Lund or AED. Everyone I've seen switch from Bama made more power and the car felt a lot stronger and drove better. For basic mods like an intake, Bama is a good choice. For mods more extensive, custom tune should be the only choice.
2014 GT - Track Pack, Leather Recaros, Electronics Package, Back-up Camera - Ported CJ Manifold, SCJ Mono-Blade TB, Custom Intake, Kooks 1-3/4" LT's, Kooks O/R H-pipe, Borla S-Types, AED Tuned - 443 RWHP / 388 RWTQ
Ordered: 3/19/2014 - Built: 5/13/2014 - Delivered: 5/19/2014