hmm, i'm european and i just stop to trust to Bosch spark plugs 10 years ago. NGK is better quality like Bosch. Bosch disappointed me with 3 or 4 contact spark plugs.

 

i suppose u can look at some irridium plugs. in general theyre the same. u can try those 4 prong ones. id go to like advance auto or something and ask what they recomend. see what shops like that will tell you. if the majority are recomending one kind and not really pimping it cuz its on sale or whatever, give it a go.