I have an 05. I bought iridium plugs with only one prong. That was 2years ago. I have had no problems. Just make sure you buy good quality name brand plugs. Some of the Bosch plugs have 2 and 4 prongs. The spark still can only jump from one prong regardless of how many prongs there are. Just a marketing gimmick to charge more.
Last edited by ghoulardo; 06-15-2011 at 06:31 PM.