A couple of years back, the same company was advertising engine components for sale. We informed them these parts were no longer authorised for use and had been withdrawn by the OEM, yet they continued to advertise them. Suddenly, one of our customers sent the same parts in to us to fit in his engine to save cost. He didn't get his money back and one of the parts is mounted on his desk as a reminder, things are cheap for a reason and not everything is what is seems, so check and check again.