Originally Posted by zipper06
ProComp recomends NGK 8's, but that's too cold for a gas motor. We run NGK 7's for gas and NGK 8's for alcohol.
Yes i know the #'s sound backward but NGK plugs have lower # hotter.
JMO
Zip.
ngk 8 to cold,i guess i better stop using 9's and try some 7's.