BMW / Toyota B58 Valve Spring Kit by Ferrea

Ferrea valve springs effectively combat three critical issues that can compromise engine performance: binding, breakage, and valve float:  Binding occurs when valves fail to open or close properly, risking severe engine damage. Breakage can result in valves dropping into the combustion chamber, leading to catastrophic failures. Valve float, often caused by inadequate spring rates, results in power loss and combustion leaks at high RPMs. These valve springs are meticulously heat-treated and stress-relieved, ensuring stability for high-lift and high-RPM applications while minimizing load loss. Ferrea also offers precision CNC-machined retainers, providing superior strength and stability to withstand rigorous racing demands. To guarantee optimal performance, Ferrea Spring Seat Locators are crafted from robust 4140 chromoly alloy, ensuring precise tolerances and a flat, parallel spring pad. The hard Nitrided surface treatment enhances toughness and wear resistance, making them an exce