The UPD M113K performance 5 piece idler kit , includes all pulleys needed to replace the factory plastic idlers on your performance AMG with a high quality CNC billet aluminum machined performance pulley set. PLUS the Mercedes double idler inner sleeve that is sold not sold separately by MB. This part is almost always damaged when idlers fail and spin on this aluminum sleeve. Then all future idlers are prone to wobble and fail early. High quality Nachi bearings are used and only double metal bearings seals are used to protect bearings from heat and dirt. All our billet performance idlers have a ultra hard anodized coating. *


Includes 5 billet idlers, one double idler spacer and one coveted custom billet double idler inner sleeve. No other complete kit like this on the market with over 18 years of proven M113k history. ***Pic of engine with idlers also shows are Belt wrap kit that is an additional available aftermarket kit, ***


Ships same day if received by 2pm Central time. 

  1. Designed and made with special large slots for cooling to keep pulley`s and bearings cool. Slots cost more to make and also run quieter than small hole designs pulley`s that are known to be noisy and some even whistle through the holes.  Protect your invest with large cooling slot design and a 10 year proven product from a 18 year old American company.  
  •  CNC Billet hard anodized coated *ZZ rated high speed Nachi bearings
  •  Smooth quiet running * Easy install
  •  Made in USA and highest quality available 

Replace your idlers with UPD`s performance idler set today, as the stock AMG plastic idlers, with rubber bearing seals, are known to fail from the high heat and dirty conditions under the hood.

Fits the below models and years in the M113K engine only.  **** Pic 4 is an engine picture showing location of 5 idlers on a modified M113K engine with other UPD parts shown, not included in kit.  

WARNING: Beware of cheap knock off and copies made of inferior parts and bearings. UPD is the original mfg and designer of these USA made and tested parts. 25 years in business and these parts have been tested and proven for over 18 years now. We use the best bearings, exacting tolerances and high quality billet aluminum for your AMG/Mercedes! 


Fits all M113K engines in AMG models ranging from 2003 to 2011, E55, SL55, CLS55, S55, CL55, G55 




CL55, S55,CLS55,SL55,E55,G55, CLS55, G55
Year2003,2004,2005,2006,2007,2008,2009,2010,2011
EngineM113K