I finally got around to installing the kit today. The kit comes with two Ferrite Core Harnesses. I only used one, & hooked it to the passenger intercom harness under the seat. That took care of the squeal we were hearing, when keying the mic for the CB. Don't know if that will work with everyone's 06 w/airbag, but it fixed ours. We'll hold on to the second one, just in case I have to eventually hook it up to the drivers intercom too.