When I bought my car, I was given all the receipts the previous owner had. In them was a receipt from a Viper place in NC (where I bought the car) called 2FastVipers. I believe they are closed now, but one of the receipts was for turning the flywheel, and I've had no problems out of mine. I'm not sure when the flywheel was turned, but I've put 10k miles on the car since I bought it.