I bought a 04 wrx with a sti ej25 block and the wrx ej20 heads im trying to get the car to start and i dont think they ad the right plugs in there. So my question is what spark plugs should i be running in my setup?? Should i get the ngk for a wrx 2.0 or a wrx sti 2.5??? Thanks guys!!

curious also

You should use 2.0 spark plugs .30 gap

yea 2.0l plugs since those are the heads you have. I imagine it would still start with the wrong plugs in it though

ok so 2.0 wrx plugs i wil get. ya the plugs they had in there wernt matching up to sti or wrx plugs and they were fouled really bad so i wanted to put a new set in just for a piece of mind!! Thanks guys!

.30 gap is the correct gap?? Thanks

i usually do .028" but .030" is fine also.