How do you remove the factory limits off the engine of a 2008 v6 mustang?
I think the company SCT make a module that can take this off. I know here in Australia a company called "CAPA" sells flash boxes that use software that can disable it. CAPA boxes are supplied Direct from the USA by SCT. You have to have your car professionally tuned though.
The box can change 1000's of parameters from air / fuel ratio to gear shift patterns. It was the XR6T owners hail from heaven.
Hope this helps