When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
We now have a 72mm clutched supercharger pulley to repalce your OEM supercharger pulley that often goes bad. It is 2mm smaller, better springs, parts and requires NO tune! Will give a light bump in power from turning a little faster and is a light lighter. 10% coupon on homepage you can use. Also many other sizes of [pulleys, idlers and air intakes as well. 72mm link
__________________
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.