Originally Posted by tom @ eas
To clarify on this, the Dinan pulley includes their own warranty, which a lot of forum members often mistake for an "approved" BMW part. Needless to say - the Dinan parts are very reputable.
We like the Rogue pulleys, which utilize "off the shelf" belts, which can be purchased from any auto part supply house and provide considerable gains.
Thank you for clarifying what I was trying to say tom. The forum was acting up on me and wanted to throw my thoughts out quick. The Dinan parts are not an "approved" BMW part, Dinan backs your factory BMW warranty with theirs so you are therefore covered through them when you install their part. Hopefully this makes sense.