Ferrea Subaru STI Dual Valve Spring - Single (Drop Ship Only)

The S10098-1 is a single dual valve spring from Ferrea, designed for Subaru STI engines. This component is crucial for managing the timing and lift of your engine's valves, ensuring proper combustion and performance. Ferrea uses a high-tensile wire in their springs, which helps them maintain consistent pressure across a wide range of engine speeds and temperatures. This means your valves will open and close precisely when they should, even under demanding conditions.

When rebuilding or upgrading the top end of your Subaru STI, choosing reliable valve springs is important. These springs are built to handle the stresses of performance driving, offering a solid option for those looking to maintain or improve their engine's valvetrain. The dual spring design provides added stability and control, helping to prevent valve float at higher RPMs. This particular part number is for a single spring, so be sure to order the correct quantity for your engine's needs.