Due to the fact that my new (so to speak) '97 has so few miles yet, the original spark plugs are still in it. When Spring comes and I break the ES back out, I want to make a few changes. I am currently running Splitfire Platinum Plus plugs in a different vehicle, and they made a marked difference in performance. Has any one tried the Platinum Plus 4's ? What was the result? I've noticed some of the members are using the NGK's, are they better than the Splitfires or Plus 4's?