Harvick’s #4 Stewart-Haas Racing Ford caught fire during last weekend’s first playoff race at Darlington, despite no crash damage or contact with the wall. Flames erupted out underneath both sides of the car and came in through his dashboard at one point, causing the 2014 champion to retire and be classified 33rd.
After he vocally took NASCAR to task following the incident, NASCAR responded that cars catching fire was "unacceptable" and mandated several changes to the car’s chassis this week that have taken effect this weekend at Kansas Speedway.
