I think that depends on how your sled is jetted. I can't run NGK's in my sled or my dad's, because otherwise they will bog and hesitate. However, if I run Champions in the 83 Trail (which usually has NGK), it will bog. I have yet to find one type of plug that completely dominates another kind. Even though plugs cross reference, it doesn't mean that they are 100 percent identical. It just means that they are as close as the manufacturer has to the competitor's plug.Originally posted by Racing666
[br]i hate champion plugs.. engines have a slight bog with champions, but with ngk it revs fine.