Fitment: This Engine Camshaft Timing Chain & VVT Gear Kit fits engines with the code S63B44A and N63B44A (Note: not fit S63B44B and N63B44B) , designed for BMW ALPINA B7 series 550i GT series 650i series X5 E70 2009-2013. Material: The Engine Camshaft Timing Chain kit is made of metal that ensures longevity and optimal performance. Package Contents: The kit includes 2 timing chains with rails, 2 fixed timing chain rails , 2 upper rails, 2 timing chain tensioners, 1crankshaft gear, 1 oil pump chain, 1 oil pump gear, 2 Timing Chain Sprocket - Intake Camshaft and 2 Timing Chain Sprockets - Exhaust Camshaft Functionality: This comprehensive kit provides all necessary components for engine camshaft timing chain replacement or ensuring smooth engine performance. Easy Installation: Directly replace the Engine Camshaft Timing Chain kit , professional installation is recommended. Specification: Material: Metal Size Chart: Package Size: 35cmx19cmx23cm/13.78inchx7.48inchx9.06inch Package Includes: 1 Engine Camshaft Timing Chain and VVT Gear Kit Note: Please allow slightly errors 1-2cm differences due to manual measurement.