i have an 05 wrx, just tryn to see which spark plugs are the way to go... dont know if this makes a diffrence but my supporting mods are: big tmic, utec, catless turbo back, uppie, boost controller... all opinions are greatly appreciated...

... there's an FAQ in stickied in the Service and Maintenence section

thanks, sorry for the post!

Stock platinums work just fine. There's not a single thing listed in your mods list to warrant any heatrange changes and sometimes iridiums cause det issues because of the tiny electrode. Coppers won't do isht for you either besides foul up quicker.

would i need to gap them? dont know much but i run 18psi on pump gas.. dont know if that makes a diffrence..

READ the sticky now that this is in the right forum!!

will do my friend.. thanx for the heads up...