Eric....I NEED YOUR HELP!!

[Strokeit08]

Hey Eric, My name is Brandon..I'm a huge diesel guy i have an 04 6.0 pushing 450rwhp and an 08 pushing 510rwhp...My 08 has airaid intake, mbrp dual exhaust straight pipe from turbo and a DD with 75hp, 150hp, 210hp, and 275hp tunes...I want to run giggle gas and injectors....I talked to Matt today from SDT and he said they can still up the tunes for that specific app. how come they won't up it for factory injectors( I know these trucks have more to give)? Let me know your thoughts on that would ya>?