The Ferrea Audi DAZA Single Valve Spring is a lightweight, high-performance valve spring designed for use in Audi engines. This valve spring is constructed from high-tensile chrome silicon steel for superior strength and durability, and features an optimized design that ensures consistent valve lift and stability. The spring is designed to handle up to 10,000 rpm and is perfect for high-performance applications. It is also resistant to wear and corrosion, making it ideal for long-term use.