Supertech Mitsubishi 4G63 Dual Valve Spring Kit

Supertech is well-known for making performance engine components, and this dual valve spring kit for the Mitsubishi 4G63 engine is a prime example of their work. If you're building a high-performance 4G63, especially one that's going to see higher RPMs or a more aggressive camshaft, you need valve springs that can keep up. Stock springs can float or coil bind when pushed too hard, leading to poor performance and potential engine damage. This kit is designed to handle those demands.

This kit uses dual springs, meaning there are two springs nested together for each valve. This setup offers better stability at high RPMs and helps prevent valve float. The springs are made from high-strength spring steel, chosen for its ability to withstand the repeated stress and heat cycles inside an engine. They are designed to work with the factory retainers and seats, making installation more straightforward if you're already doing a top-end rebuild. The kit includes all the springs you'll need for a complete engine build. Make sure to consult your engine's service manual for proper installation procedures and spring seat pressures.