High temp NiCrFe based alloy is used for valve and 347SS valve housing will offer longer product life compared to competing designs
High temperature silicone Nomex reinforced actuator diaphragm 17-7 PH Stainless Steel actuator spring gives consistent pressure at high temperature, resist "relaxing" at temperature to 900F (483C)
Nitronic 60 Stainless Steel is used for the valve seat, and valve bushing
All Stainless Steel Tial wastegate hardware
Mating weld flanges are 304L
Wastegates shipped with air fittings and stainless hardware.
CANADA 
;)