I have been tracking for 30+ years and instructing for 20. Depending how aggressive you are, will depend on what you want to do with the pads. If this is your first time tracking this car, use common sense.... i.e.. start slowly and build speed throughout the day. I would imagine the stock pads are not meant for racing situations. In my experience, most stock pads will be fine for most novice through intermediate track drivers for HPDE events.