Ecu Tuning on a 2011 GT hp and torque gains!
anyone try them ?
they say you can gain 27 hp and 37 torque on a 4.7?
it takes 3 hours
you will see 65% of power instantly and the rest of the power after 100 miles or so...
any truth to this? AND
is 27 hp and 37 torque a big difference???