They will update the 5.7L in the cars I'm sure of it, but the question is, how long will it take to get to the cars. This is a different company mind you, but how long did it take to put the 5.7 in the cars from the trucks? I can't remember for sure, but I think about a year. Even then it lost ten hp from the truck to the car due to the exhaust being tighter or whatever the excuse. That won't be to impresive if that happens from the Ram to the Challenger. To me this engine doesn't really belong in a truck that's meant to two anyway. Maybe if you were racing it. RPMs for power and torque are just to high to tow with.