now some of you may argue this but I think exspensive plugs are the biggest waste of money in the world. In the car that I built the motor I have run 4 different types of plugs. I used stock they worked fine. I used ngk they worked fine I used denso they worked fine and lastly I used whatever cheap brand walmart sells in the orange package. I didnt notice a difference in any of them I never ran into any detonation problems caused by plugs I did however have a set of NGK and denso plugs fail on me and they were like 48 bucks a set.
Stock plugs
hmm my engine is making a funny noise could it be gasses leaking outa my exspensive ass ngk spark plug? why yes yes it is. It was at this point i said f it im going to walmart