Billet Idler Pulleys, M156

PRODUCT DESCRIPTION ***Only for Naturally Aspirated applications, not supercharged applications*** Weistec Engineering complete set of CNC machined billet aluminum idlers. The factory Mercedes parts are plastic and have been a known problem for many naturally aspirated vehicles. This is a great solution for long term use in stock to highly modified vehicles. INCLUDES:1x 62mm grooved idler1x 76mm idler1x 54mm idler1x 65mm idler KEY FEATURES: CNC machined 6061 aluminum Hard anodized to military spec Direct replacement/bolt in for M156/M159 Utilizes factory belt 100% serviceable Great for use in harsh environments High quality bearings Vehicle Fitment Matrix: YEAR MAKE MODEL TRIM ENGINE 2011 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156) 2010 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156) 2009 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156) 2008 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8 (M156) 2007 MERCEDES-BENZ R63 AMG BASE (W251) N