getting up the nerve to change out the plugs in the 04 Xjr... ive read ngk iridium is the way to go, but i do have a question. what is the difference between normal ngk iridium and 'lazer iridium'? the lazers show to be almost twice the price. Anyone have experiences with lazer plugs?

 

Used both. Difference is ground electrode. Laser uses platinum disk on electrode. Iridium IX is their high performance plug, with no platinum tip but different electrode profile. Laser = longer life... IX = their best performance...