Billet Idler Pulleys, M156

Weistec Engineering complete set of CNC machined billet aluminum idlers.  The factory Mercedes parts are plastic and have been a known problem for many naturally aspirated vehicles.  This is a great solution for long term use in stock to highly modified vehicles. 
Key Features:
CNC machined 6061 aluminum
Hard anodized to military spec
Direct replacement/bolt in for M156/M159
Utilizes factory belt
100% serviceable
Great for use in harsh environments
High quality bearings