Looking to have a RZR killer and am considering a 2.3L ecoboost and 4 link for the Sidekick. Won't be cheap but I think I can get it done for around 15k and would definitely be worth the grin everytime I blew the doors off a RZR! I've had a ton of Fords and a few different ecoboost motors that have proven to be solid and powerful enough for any challenge. Not sure what else is a better option if I can squeeze 400hp out of it!