im new to all this and new to mustangs!.
but from what i see, basically just the COBB access port, with no extra mods will get me to near sub 5's for my 2017? if so, thats immense value!
im new to Mustangs and i also had this issue! i took it to the dealer and they greased up the the rungs in the roof to get the widnow to close properly, however.. i cant see this being a good perma fix.