I don't think I looked under the hood of it, sorry, but this ran the quarter in 9.3 seconds so I'm sure it's stock.
https://www.hemmings.com/blog/2018/...8-takes-best-in-show-at-musclepalooza-xxviii/ https://www.hemmings.com/blog/2018/09/04/scenes-from-musclepalooza-xxviii/