On a 5S-FE that is. I put them in about 2 years and 50k ago. Today while driving I felt like a hiccup a couple of times under load. Might they be getting old? I think the replacement interval is 60k. [It's probably a bit too soon to replace them, but if it keeps up doing whatever it might be doing, it seems like a first step. I suspect I'll at least pull inspect them soon.]
I used NGK BKR6EKPB-11 "laser platinum" if my Amazon records are correct. Looks like NFK TE58 wire set also the same age.
I used NGK BKR6EKPB-11 "laser platinum" if my Amazon records are correct. Looks like NFK TE58 wire set also the same age.