So picked up the Iphone 4 the other day, and have since been on a mission to get it playing through my car. Bought a 100 FM transmitter that is the biggest piece of crap I've ever used. So called Ovation, they said they have a part that works with monsoon, but there computer is saying 05 and up. Mines a 2004. So question is, is there really a difference between the monsoon system found in the 04 vs 05 or does Ovation's computer need updated? Thanks guys!