I've been doing a bit of research on the differences between the AGU engines and the APY engine (for reasons, see here: http://www.audi-sport.net/vb/showthread.php?88861-More-S3-Drama) Now, I've been looking to see if the flywheels on the AGU and APY are the same today. And the answer is yes. Euro Car Parts list the same dual mass flywheel for both the AGU and APY. Simples. Now my question is this: If the flywheel is the same out of the box, then why can you buy a solid flywheel conversion kit for the AGU... but not for the APY....? Seems a little odd to me, wondered if anyone knew the answer?