I just picked up some Denso Iridium plugs IK-16 and checked the gap and found they are around .040 inches. I have been told to set at .052. Seems quite a ways from what they come. I do have a 64 mm pulley and ecu upgrade. Gap set?

 

SRT service manual says .040

 

Rednrollin - how are those plugs working out for you? I am considering changing mine and there are a lot of alternatives but I like the iridiums.

 

Probably depends on whether he set them at .052 or not.