Last trip to track - Nope! Coil went bad!?

I had one of the high vibe coils go bad in my Duster 2 years ago that might have had 10-15 hours of run time. We run them in some of the formula race cars that spin to 10k rpm every shift, had one go this past summer. We’re at the point that for 65 bucks we put a new one in on every rebuild of the motor which is about 25 hours. We also test the coils and MSD boxes every 8-10 hours of race time.