what ngk plugs yall recommend for ls/vtec with high compression piston. i have the jdm itr piston on my car... and i dont know whats the right or best ones to run for ls/vtec... i have iridiums IX right now... BKR6IX-11 and i want ngk v-power for daily driven.. what yall think is best to run??? let me know with the part number? thanks..