Product Description: * Fitment: Fits for 2004, 2005, 2006 BMW V8 N62 engines with stretch ac belts. Comparable to OEM #641040 and #83800494518. Detailed vehicle models--2004-2005 545i, 2006-2010 556i, 2004-2005 645ci, 2006-2010 650i, 2002-2005 745i, 2002-2005 745li, 2006-2008 750i, 2006-2008 750li, Alpina B7 2007-2008. * Superior Material: Manufactured from high strength premium steel, very sturdy and durable. The surface is coated with silver coating, which effectively improves the rust and friction resistance, and the service life of the market product is extended. .