Both strips on the roof of my 2014 Camaro LT have cracks in the front and rear. I've never actually had a car with cracks or any sign of wear on these strips, my guess is they're a cheap plastic instead of a durable rubber compound like most vehicles. The car is going in to be checked out 10/11/2017 and be repaired I hope. It's still under warranty and extremely disconcerting to me because i've never had a warranty repair since the early 80's. There's no reason for the damage except for cheap materials being used.