My understanding is that my 2013 GT manual is electronically limited to I think 146 MPH maximum speed. I have the the FRPP ProCal tune installed and the information I have talks about adding net 16hp and 9 ft.lb. torque, with a boost of 60 ft.lb. at 1500 RPM. No information that I could find about the top speed limit. I have obviously not had a chance to test this! Does anyone know?