Livernois tune.

[22 392]

What improvements can be had with a Livernois tune with a 392 with XR package?

 

[hardhat]

More HP. Gets rid of dip in torque curve. Ditch 4cyl mode. Adjust transmission shift points and firmness. Tire size, gear ratio.
They also have some trick to keep from dropping the p1400 (or whatever) code that shows aftermarket tune, but dealer can still tell that it has been messed with due to unlocked PCM so risk of voiding powertrain warranty.

If it wasn't fear of losing powertrain warranty, I would get one, but really happy with the whole package so not worth it at this point.