Since your X is an 04 (and assuming you got ASSIST) you dont need alot of parts from the install kit. The BT antenna is installed already as well as the ULF bracket. All you need is the ULF and the Eject box. I did mine like 15 mins, its an easy install. Bought mine from ebay, $240 for a 12th gen ULF and $40 for eject box. If you're not planning to use an Iphone, you dont need a 13th Gen ULF.