Ferrea Mitsubishi Evo X 4B11T Dual Spring Kit

Ferrea is known for making high-performance valvetrain components, and this dual spring kit for the Mitsubishi Evo X with the 4B11T engine is a prime example of their work. If you're building a performance engine or pushing your stock Evo X to its limits, upgrading the valve springs is a critical step to ensure reliability and consistent performance at higher RPMs.

This kit features dual springs, meaning you get an inner and outer spring for each valve. This setup is designed to handle the increased forces and higher engine speeds that come with performance modifications. The dual spring design helps prevent valve float, which is when the valve train can't keep up with the camshaft's rapid lift and closing, especially at high RPMs. Valve float can lead to serious engine damage, so having springs that can reliably control the valves is essential. Ferrea uses high-grade materials and advanced manufacturing processes to create springs that offer consistent tension and durability under demanding conditions. This kit is built to withstand the stresses of aggressive driving and track use, ensuring your engine's valvetrain stays in check.

When installing this kit, it's important to have the right tools and knowledge for valvetrain work. You'll be working with the cylinder head, so proper assembly and attention to detail are key. This kit is a significant upgrade for any Evo X owner looking to maximize their engine's potential and ensure its longevity under stress.