That jeep was built by Marty at KRC Performance. He builds some pretty sick stuff. It's a N/A 6.4L with cams, headers, exhaust, and a few other goodies and a decent size shot of nitrous.

You can get in touch with him at
KRCPERFORMANCE-YOUR ONLINE PERFORMANCE SHOP tell him Nathan from the Dodge dealership sent ya and he'll get you hooked up!!
PM me for more info about him or his work.