Hello guys and gals . I have a 2012 GT500 With a 4.0 Whipple 3.75 pulley and i want to see what horse power that i can get out of it. I have read and read and some people said they can get 800HP out of the stock injectors and some says you cant. My next question is i want to put long tube header with Xpipe and maybe change the injectors . What kind of Horse power are you guys getting out of a close set up that i have or talking about doing? Thanks