Thursday marks the first time we’ve had an open test at Daytona in a couple of years. With the myriad rules changes aimed at getting away from two-car drafting, the teams are going to need to make the most of these sessions — especially if NASCAR opts to make more changes before Daytona
Below, a short video explaining why radiators are such a big deal at Daytona this year. As always, happy to answer questions you might have! Drop them in the comments and I’ll reply. Or send them to me @drdiandra on twitter.