NGK all the way. My friend and I don't use anything else in my car, and the 5 dirt bikes we own between the two of us.

 

A friend of mine had a Champion spark plug literally self-destruct in his Volvo. The whole damned insulator FELL OUT and seriously damaged his motor. Champion offerred no help whatsoever when contacted about the problem.

 

Yup made it home unscathed! The weekend was a sucess! Ill post what the autolites look like when I pull them later this week.

WG, I had the same problem with Nippodensos. The insulator cracked every time I used them.