The Cylinder Head Assembly Valves Bolts Kit 06H103064L is a high-quality replacement part made of durable aluminum material. It is a direct fit for Audi A4, A5, Q5, A6, and TT models, featuring easy installation and operation. The kit includes the engine cylinder head and valves, with a manufacturer warranty of 3 years for added peace of mind. This creative design ensures a beautiful appearance while delivering reliable performance for your vehicle. Fitments: Replacement for A4 A5 Q5 A6 TT Quattro 2.0L 2008-2015 Part Numbers: 06H103064AC, 06H103064L, 06D109601M, 06D109611H Valve spring stabilization: The valve springs apply the necessary tension to quickly return the valves to their closed position, maintaining consistent pressure within the cylinders Valve keeper positioning: The valve keeper secures the valve spring in place, enhancing engine stability and durability Easy install: This product can be directly replaced and installed easily, but it is recommended to install it professionally