In response to evolving environmental regulations, the automotive industry is increasingly adopting heavy-duty engines powered by low-carbon fuels such as natural gas and hydrogen. To support this transition, Variable Valve Actuation (VVA) systems offer strategic advantages, including enhanced engine braking for improved safety and extended maintenance intervals. Additionally, advanced valve control strategies-such as Late Intake Valve Closing and Cylinder Deactivation-help reduce pumping losses and maintain optimal after-treatment system temperatures. VVA systems must integrate seamlessly into existing engine architectures without compromising reliability. Consequently, their development demands significant expertise and rigorous R&D efforts. Streparava has addressed these challenges with the development of the “E.A.S.Y. Lift” (Enhanced Active System Lift), a modular VVA solution featuring three independent rockers per cylinder (intake, exhaust, and engine brake). These rockers are available in fixed, switchable, and extendable configurations, enabling flexible valve lift profiles. This architecture supports implementation of the Miller cycle, cylinder deactivation, and high-efficiency engine braking. The hydraulic system has been engineered for rapid response-within a single engine cycle-ensuring dynamic performance. Moreover, the mechanical design allows continued vehicle operation in case of system failure, enabling safe transit to service facilities. This paper presents the full development process of E.A.S.Y. Lift, including multibody simulations, finite element analysis, and validation through fatigue testing on engine benches.