Supertech Mitsubishi 4G63 Dual Valve Spring Kit

This kit includes a full set of Supertech dual valve springs and matching retainers, specifically designed for the Mitsubishi 4G63 engine. These components are crucial for managing valve operation at higher engine speeds and under more aggressive camshaft profiles. When you're pushing your 4G63 beyond stock limits, the factory valve springs can struggle to keep up, leading to valve float and potential engine damage. This dual spring setup offers a more robust solution to ensure your valves close precisely when they should, even under demanding conditions.

Supertech is known for producing well-built engine components, and this dual valve spring kit is no exception. The springs are made from high-grade steel alloys, chosen for their ability to withstand the repeated stress and heat cycles inherent in high-performance engine operation. The dual spring design provides increased seat pressure and a higher open pressure compared to single springs, which helps prevent valve float and ensures accurate valve train response. This is particularly important if you've upgraded your camshafts to a more aggressive profile, as these cams require stronger springs to control their lift and duration effectively. The included retainers are also made to precise specifications to work seamlessly with the springs and your cylinder head.

Installing this kit is a significant step for anyone serious about building a high-revving or forced-induction 4G63 engine. It's a key component for achieving reliable performance and protecting your engine's internals when you're operating at the upper limits of its capabilities. Ensure you consult your engine build specifications or a trusted mechanic to confirm this kit aligns with your specific camshaft and overall engine build goals.