I have the rb4 it came out of a 05 dodge ram rumble bee, that was rolled over. It fit all different type of dodge, chrsyler, jeep vicheles. Its a great radio, i had it in my 04 dodge ram. It comes with both east and west navigation cd, the only thing missing is the antenna but you can get one on ebay for $75.00. I'm willing to let it go for $600.00 obo, buying the unit at the dealer will run you around $1000.00 plus. The installation is easy it clip right it the stock cables.