E63, C63, CLS63, SLS63, S63, G63, Cl63 AMG M156 AMG 5 Piece Idler Pulley Set e55 Gains about 40hp & 50ft/lbs

Gains about 40hp & 50ft/lbs tq on stock engine

or E class with AMG rear bumper

Compatible with most all cars with the 2

*Direct TCU flash requires you to send in your TCU for software install

E63, C63, CLS63, SLS63, S63, G63, Cl63 AMG M156 AMG 5 Piece Idler Pulley Set e55 Gains about 40hp & 50ft/lbsThe UPD high performance M156 5 piece idler set will completely replace your stock plastic idler pulleys with a high quality CNC billet aluminum machined performance pulley set. High quality Nachi bearings are used and only double bearings seals are used to protect bearings from heat and dirt. All of these billet performance idlers have a ultra hard anodized coating. 5 axis CNC machined for precise quality and made in USA CNC Billet hard anodized