Seller notes

Designed with special long cooling slots to keep bearings and pulley`s cool , plus help protect your investment. Slotted idlers allow more air flow and known to run quieter than small round hole idlers. The UPD M113K performance 2 piece idler kit. 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 protec...

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