I can't believe somebody finally did this and got it to work, and only 6 SRT drivers respond? I've been preaching for the last eight years all the XF needs is a better gear to wake it up.
I installed a 3.73 gear into my X and without making any other changes it cut my 1/4 mile ET's by 1/2 a secound.
That means some modded SRTs will soon be ripping off 10. sec runs, and we should get to break into the 13's on all NA cars with just a few mods, just using all motor, This should revolutionize the crossfires performance.
There should be dancing in the streets for news like this,