Oversized Pulley Kit for higher boost includes:
1x Oversized crank pulley
1x CNC machined billet impeller
1x Longer supercharger belt
Oil seal kit (9x oil seals, complete internal hardware kit, threadlocker)
2x Upgraded ceramic impeller shaft bearings (high precision ABEC7 impeller shaft bearings with partially crystalline PEEK-carbon fiber reinforced cage rated to 250°C (482°F) as specidied by Alpina for use in B5S/B6S high power models. Max bearing speed up to 110,000 rpm)
1x Precision-machined Impeller Bearing Installation Tool
Fits all supercharged Alpina B5/B6/B7 models.
Estimated +50HP gain