M-2....
DooDaddy..........this Challenger is powered by Mercury's V-6, M-2 engine. There have been some handling issues with it by other members. Most of which are planning out. This can be done fairly easy though with the addition of a trim tab designed by an aftermarket company. I should have copied the link, but it's in the forum.
The engine seems to be a reliable one. I've not heard any other major complaints on it!...........Good Luck!