I was a bit disappointed myself about the results , I know I would take him easily at a track from a dig but still don't understand the whole "roll" deal. I know my car is running hot at the moment , As soon as I got home my temp gauge was almost by the red part. Im thinking my head gaskets may need replaced since I just replaced the lim gaskets not long ago and also the stat. Im just gonna drive "safe" till I pull the motor for the XP cam install and Gen V and im just gonna redo the whole gaskets.