Hey, I used to work for honda. Why are you replacing them? are they faulty? I have never had to change them before cause they rarely go, but if you are gonna change them, there is a 10mm bolt that holds each one of them in. Unplug the connector for the coilpack and undo the bolt and they will come right out. Underneath the coil pack is a rubber sleeve that insulates the connector for the spark plug, so if it doesn't come out easy just pull up and twist it back and forth until it comes out.