Yeah, there's a lot of info on people blowing things up, or not. As Mr. Brooks says, billet flywheel mininum. Billet because no one makes a high RPM forged version. I've found that the "Stage 1" modifications add quite a bit of performance while maintaining a safe margin. I'm not one to be overly concerned, or on board with the dire warnings some like to keep forwarding. There's a bit of maturity and restraint required when operating a throttle, with a spinning mass six inches below and next to, body parts. Look up Stage 1. Also my two cent's worth.