Mercedes AMG M137, M275, M277, M279 UPD V12 Billet 4pc Idler kit. (2001-21 )

The UPD high performance M275, M277, M279 M137, V12 billet 4 piece replacement idler set will replace your stock plastic double idler pulley assemble and tensioner pulley 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 our billet performance idlers have a ultra hard anodized coating and custom billet bearing shields for looks and dirt protection.Our leading AMG Mercedes idler designs have been on the market since 2008 and installed on thousands of AMG cars! Note: v12 engine pic is of 3 of the 4 idlers to show what stock and Billet differences are and one bearing cap is shown to also show what parts look like without billet bearing shields.   CNC billet aluminum with hard anodized coating   ZZ rated high speed Nachi bearings   Smooth and quiet running   Easy install   Made in USA and highest quality available  Replace your idlers with UPD`s