E55, CLS55, SL55, S55, M113K AMG Mercedes Performance Double Idler Set Supercharger Pulley 6 transmission has known to

6 transmission has known to be a a bit slow when it comes to shifting

-Direct bolt on

M177 RaceIQ ECU Tune

Compatibility: W211 2007-2009 E63 AMG

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

E55, CLS55, SL55, S55, M113K AMG Mercedes Performance Double Idler Set Supercharger Pulley 6 transmission has known toThe UPD M113K performance 2 piece idler set with important custom supercharger tensioner pulley bearing shield. Includes both double pulleys needed to replace the factory plastic idlers on your performance AMG with a high quality CNC billet aluminum machined performance pulley set. High quality Nachi bearings are used and double bearings seals are used to protect bearings from heat and dirt. All our billet performance idlers have a ultra hard anodized