only if iridium can cope with high boost better then I will go with iridium.
Copper is the the way to go especially for high boost car like evo

Gap is important, also try to stay at stock heat range, try a set of bpr7es gap to .024~.025

 

Talk to your tuner to see what he suggests your spark plugs gapped at. Everyone is a little different. If youre not sure gap the new plugs the same as the old plugs.

Cheers!

 

i was going with the stock plugs gapping them at 26 is ok right!?