I have the 4 tip Bosch platinum plugs and they work pretty good. I heard bad things about them, that they are too hot for the engine and that kinda stuff. I don't know, had them since before September and work pretty good, I should probably just check and see how they look. I didn't want to get the 4-tip ones but it was too late, I had the car in for a total check up and all that crap including an oil change, and some other things (paid for by the dealer I bought the car from) and the mechanic put in the 4-tip ones, I found out after he put in like 4 of them and said that I want the 2 tip ones but he said these are better. I said they are too hot, and his response was, not for this car, so I let it slide.