Im trying to decide what plug to run this year. Im currently running a 2# pully in stock plugs with no problem. But im going with a 4# this summer. What are you JDM chip users running with 4# pullys. Anyone running the Densos with there JDM chips. I dont mind spending the money for the plugs, if i dont have to worry about them and they work. If not ill go with something else. Thanks.

 

i'm using them, just because they are just as good and they last a hell of a lot longer

i think they run great, but i haven't compaired them to nkg's

 

NGK-TR5