They look sexy on it :-) rating of 41k was on the spec sheet, not sure what the factory 20g did. my ecm had a non-adjustable dwell time and the factory coilpacks couldn't handle the 3millisec for very long so every 3-6 months one would overheat if it ran a bit lean. The new ones can handle 5ms under full duty. I've had this craving for pizza n wings, just won't go away.