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The Turbosmart Gen-V WG38/40 3 psi black inner spring is made for external wastegate assemblies and sets the inner spring opening pressure to 3 psi. It’s intended for use in WG38/40 wastegates where a specific inner spring rate is required to achieve target boost behavior. Turbosmart supplies these springs as service or calibration components for external wastegate setups.
Turbosmart Gen-V WG38/40 3psi Black Inner Spring
