Spark Plugs with Two-Step

[Bobby Fazio]

Who has a spark plug recommendation? I have been running Autolite AR in both cars for a while but I have to change the stocker plugs often and the sub 3000RPM two step launches seem to foul them up. Have tried AR24 and AR25. A fresh set of plugs sounds very crisp on the two step but declines after 10-15 runs. Leaning out the two step hurts the launch. I check at least 1-2 plugs after every run to keep an eye on it. Is it possible that plug quality isn't that great anymore I was thinking of checking out Denso due to their being a contingency sponsor and trying to sift through their many plug options.