Rejects make you stronger actually

Rejected makes you find ways to improve yourself to be accepted. Alternatively is to find ways to stand on your own feet. You are successful when others need you to accept them instead. Turning things around for your own advantage.

Turbo charger manufacturing process

This is one good video presentation of how a turbo charger is made. It is a good modification part to a car for a more efficient combustion, and use of exhaust gas.
Reference:
Watch "How a turbocharger is made" on YouTube