Yes the Redeye/Demon DS is stronger than the Hellcats DS. I believe as long as you have a Challenger A8 it should fit, but I haven't heard of many trying it. I'd only buy a RE DS if you can find a nice used one on the cheap. Otherwise you might as well spend the money and get an aftermarket one. 2015 was the worst year for the DS, they kept getting better and better after that.