E55, CLS55, SL55, S55, AMG M113K ECU Tune carbon fiber The UPD high performance M156

The 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

1 idler pulley

Ultimate Performance supercharger belt wrap kit

or E class with AMG rear bumper

E55, CLS55, SL55, S55, AMG M113K ECU Tune carbon fiber The UPD high performance M156M113K RaceIQ ECU tune with tuning software and cable included. Compatible with most all cars with the M113K engines: E55, CLS55, SL55, S55, AMG Dyno tested Better throttle response Customized to your vehicle modifications Instant power gains Top speed governor removed Optimized timing and fueling maps Flash tune within the comfort of your own garage via the OBDII diagnostic port of your vehicle using OBD cable or My Genius handheld programmer