Supertech Subaru WRX/STi 16V Single Beehive Valve Spring Kit

The single beehive design of these Supertech valve springs for your Subaru WRX or STi is a notable choice for performance builds. This design allows for a lighter retainer and a more compact spring package compared to traditional dual spring setups. This can lead to reduced valvetrain mass, which is crucial for high-RPM operation where valve float can become a serious issue. If you're rebuilding your top end or looking to handle increased camshaft lift and duration, these springs are a solid option.

Constructed from high-tensile wire, these springs are built to withstand the demands of performance engines. The beehive shape isn't just about saving weight; it also helps to reduce spring surge, a phenomenon that can occur at high engine speeds. This means more consistent valve control and better performance when you're pushing your engine hard. The kit includes everything you need to replace the stock springs, ensuring a complete and proper installation for your Subaru's engine.

When installing these, remember that any time you're working on the valve springs, it's a good opportunity to inspect your valve seals and guides. Ensure you have the proper tools for compressing the springs during installation, as this is a critical step for safety and correct assembly. This kit is designed to work with the specific valvetrain geometry of the Subaru WRX and STi engines, making it a direct replacement for the stock components.