you are able to change the diff ratio with Forscan at this address
726-15-01
xxxx
****
xx--
in those 4 spots you can put any number between 0 and 655, aka any diff ratio beween 0:1 and 16.21:1
here are some common ratios
3.15:1 = 013B
3.31:1 = 014B
3.55:1 = 0163
3.73:1 = 0175
4.09:1 = 0199
thats about $40k adjusted for indflation. you can get a basic EcoBoost Premium High 201A for that nowadays (before dest & delivery, tax, title, doc fees, dealer scams, etc)
normally i unconditionally love my Mustang, but it's hard to do so when it refuses to start, stranding me at Walmart for 15 minutes. it had a bunch of invalid data and lost communication with ABS codes and the few times it did actually start, shifting into reverse shut it off
remember the mounting hardware, you cant get all of it separate of the factory cat-back
you can only get the spring (5F264 in the picture), actuator itself (6K789 in the picture), and nuts to mount everything (HN3 in the picture). the mounting plate and bracket that the wire harness clip to...
you will need 1X PR3Z-14A411-C and 2X PR3Z-14A411-A. i should note that if you plan to do the Dark Horse exhaust, it has different wires that connect to the actuators due to the longer distance. those ones are PR3Z-14A411-S and replace the ones ending in "A".
i found the wiring and it looks like the wires for active exhaust always exist at that connector, just are not used and not called by anything by programming. this is also backed up by the pictures i sent earlier, which seemed to always have the same wires regardless of whether or not it had...