I would take the time to test it myself before sending it in I've had two MSD race boxes die, one old MSD 404C three years ago and a 7AL2 last year. MSD couldn't, wouldn't fix the older unit They did repair the 7AL2 and return it quiclky I have a 7AC, maybe it is 7C, also that I put in the car while the 7AL2 was out for repairs to make sure it was the box.Nobody works for free and somethings get lost or messed up in shipping