I did this today.
It is a great mod, and great write up from Grimace. I also completely removed the elbow from the bellhousing as I could not get my hand up there to get the line in.
One precaution. Do not, and I mean DO NOTlose or drop the clips. The clip on the top line shot out and fell right into the hole below it. I figured it looked generic and I could get one locally. I called a friend for a ride and went to every auto parts and home improvement store in town. It is not generic. I finally pulled the fender liner off and found it. After that, it was smooth sailing.
This is a very worthwhile mod, especially if you have experienced soft pedal, low grab or high rpm induced strangeness.
2012 Mustang GT M6, tuned by AED. 11.79 @ 116.26 with 3.31 gears.
<------------ Click Under New Orleans for my YouTube videos. Tons of exhaust and drag racing vids with my 2012 GT.