I run the 420-117 in one of my 582s. I wish I had run the 420-116. The 420-117 made great steam up top but it was a turd down low. The car would 60 foot 1.09-1.11. It was 4.80 and 7.60 ET wise. In the heat it slowed up to high 80's and high 60's. I will say that the car was stuck. Whatever it ran 1st hit of the day is what it ran the whole day.