get rid of the plugs......you dont go colder until you have the 3.4 pulley on. it will make it run not smooth and get bad gas mileage
what did you get for a program from overkill........is it for the 3.4 or the way you have it set up now?
you can use stock plugs until you put the new pulley on. The dropping heat ranges is just to kill knock retard when you drop pulley sizes. Always run as warm of a plug as you can with no KR..........obviously you need something to scan with to check that out though......TDC racing has them cheap(aeroforce)
