Supertech Audi V8 4.2L 40V Dual Valve Spring Kit

This Supertech Dual Valve Spring Kit is specifically made for the Audi V8 4.2L 40V engine. If you're looking to upgrade your engine's valvetrain for improved performance or to handle more aggressive camshafts, this kit is a solid choice. It replaces your stock valve springs with a well-built, dual-spring design that offers greater stability at higher RPMs and better control over valve motion.

Supertech uses high-tensile chrome-silicon wire for these springs, which is known for its strength and ability to withstand the stresses of repeated opening and closing cycles. The dual-spring setup means you have an inner and outer spring working together. This design helps to prevent valve float, especially when you're pushing the engine hard or have installed a more aggressive camshaft profile. The kit includes the springs and often the necessary retainers and valve locks, ensuring you have the core components needed for a valvetrain overhaul. Proper installation is key, so always refer to the manufacturer's detailed instructions to ensure everything is seated correctly and torqued to spec.

When rebuilding or modifying an Audi V8 4.2L 40V, paying attention to the valvetrain is crucial for reliability and performance. This Supertech kit addresses the springs, which are a critical component in managing valve operation. Ensure you have all the other necessary components for your specific build, such as new valve seals and potentially upgraded camshafts, to get the most out of this spring kit.