I looked all over the forum but did not find a plug change procedure that did not involve pulling the intake manifold. So here ya go. You will need; a 3/8" drive 5/8" spark plug socket, a 3/8" drive knuckle, and a 3/8" drive extension about 6-8" long. You may have to remove the solenoid / check valve for the secondaries, to get enough room for you to be able to reach the wires in the back to pull them out. I highly recommend doing plugs/wires at the same time, mainly because I can never change my plugs without screwing up at least one wire. Attach the knuckle directly to the spark plug socket, and the extension to the other end of the knuckle. I found it quite easy to change the plugs in mine, it only took me about 45 minutes, now that I have done it I could probably do it in a 1/2 hour or so. Only other things to remember are, make sure there is no oil in plug wells, and do yourself a favor and check compression while you are there, there is never an easier time.