Description Reviews The MINI Guide Tube is the part inside the transmission that the throw-out bearing rides in and out on. Are you about to replace your clutch? Then pick up one of these OEM MINI Cooper or Cooper S throw-out bearing Guide tubes. This must be replaced every time you replace the clutch. Once you're in there, you will find that these are worn and need to be replaced, so don't slow yourself down, order one now! We stock all three tubes, just pick the one you need.