Blower kit, headers, CAI, custom tune and you will be pushing 600 rwhp with a manual.
The stock internals can handle all the power that would be usable on the street.
2011 SS IOM Vert. ECS Vortech 14 psi, Water/Meth, Wideband with Firewire to SCT, 2800 stall, LT headers, Drag radials, Drag alignment, Cradle Bushings. Details in Garage. I hack it up, Ted tunes it in.