I have a KCS55A HSI system removed form a 2003 Baron, and a very nice harness removed from a Mooney Bravo that I don't think I am going to use now. The connectors and wiring are worth at least $1000, and will make this as close to a drop in system as you can get. This is a high serial number unit in excellent condition, why buy a 35 year system when you can get a 13 year system for not much more? $2900 plus shipping for harness and system, $2500 for HSI system. Don, supercub180@gmail.com