The Tial 44mm wastegates valve and valve housing are made of 347 Stainless Steel Alloy. The actuator diaphragm is reinforced with high temperature silicone nomex. 17-7 PH Stainless Steel actuator spring gives consistent pressure at high temperature, resists "relaxing" at temperature to 900F (483C). Nitronic 60 Stainless Steel is used for the valve seat, and valve bushing the same material used in the higher level gates for reliability and longevity. Wastegates shipped with air fittings and stainless hardware.
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