I have only ever heard of brand new release bearings being noisy with this particular brand of clutch kit. We have sold Comp Clutches, Blueprint, Exedy (OEM, Organic and Paddles) and we also supply new aftermarket release bearings. We've never had a single complaint! I have fitted 4 of the release bearings myself last Summer and none of them made a noise (can be proved as I still have a GT and a Glanza here, both using the release bearing we sell).