Valve seal Audi V8 40v 4.2L / Audi A8 / S4 / RS6 2003 - 2008 ST-VS-VBM6E

Viton valve seals with reduced outside diameter are ideal for those who use double valve springs or may have problems with valve spring play or simply need to install new valve seals due to worn components. (Viton) seals have a temperature range of -5 ° to 450 ° F, making them one of the best high temperature seals available. Viton has good flexibility like nitrile which means it can handle some runout between valve stem and guide. It is also considered a more durable material than silicone. Viton has also better wear resistance than most other sealing materials, making it a good choice for applications where long-term durability is a must.Fits: Audi V8 40v 4.2L / Audi A8 / S4 / RS6 2003 - 2008 Qty per pack: 8 pcs & nbsp