That will be very hard to call as the 0-60 runs vary a lot on the 5.7L. The fastest I have ever seen is 5.3 secs on the 300C a few times, the slowest from a credible outlet I have seen is 5.9 secs. I'm going to go with an average of 5.6 secs for the LX cars currently. Taking into account there will be at least a 40hp boost & 14ft-lbs of tq boost with a more consistent range of power, I would guess that it should do it at least in 5.3 secs for the automatic and 5.1 secs for the manual, but I'm no expert.