I bought my plugs from Thunder Racing and it says it's gapped at .050. Should I still gap them? I don't have the tool for that though. Would anyone suggest anything different?

 

Always check plug gap before installing.

 

Check the gapping anyway. I bought some NGks from thunder a while ago and they were gapped at ~.06 and had to regap them.

If you use one of those little disk things to set the gap make sure that it's the edge of the spark site that is at .05, not the middle of the spark site.