2011-2014 Mustang GT Tech
So I have about 12K miles on my 5.0 (bought it at 10K), and the past few days I've noticing that unsettling sound of what sounds like engine knocking. I had this on my v6 when I had the Bama tuner, but now on this one I notice it suddely under load in 3rd and 4th gear. I have been putting in 87...