spark plugs for GT-40X heads

[meknized]

Hey,

Thanks for the response. What threw me was that the autolites had a shorter thread then the champions. But the electrode depth was the same. Oh well had to make sure. My current best time is a 12.02 @ 112 60ft. 1.7. That was on M/T 10X26 slicks. 12.5 @ 109 on radials. My launch was roughly at 3500 rpm or so. I know I can hit an 11. That particular day there was a 12 mph head wind, not saying that I would have hit an 11 but I think I could have maybe knocked out that last .03 of a second without it. I'm still learning to launch on the slicks and could launch harder, but I don't get out to the strip as much as I would like to practice. Always fun though!!
There is some pictures of my car on www.haiokuracing.com during a imports vs domestics at our local track. click on past events at the bottom on sun May 14th. I'm the blue and silver GT.