This is the Tial 38mm MV-S External Wastegate. This is one of Tial's more compact wastegate that offers optimal boost control throughout many ranges. The MV-S supersedes the previous 38mm design, and now includes water cooling ports among other improved features to prolong the performance and longevity of this component. Tial wastegates are highly utilized among enthusiasts with high-horsepower daily drivers, and they are also employed on track dedicated race cars, and rally cars as well.
Water cooling ports (not required to run) for those heavy-duty applications, three bottom pressure ports and two top ports for boost controllers like the AMS-1000
High temp NiCrFe based alloy is used for valve and 347SS valve housing will offer longer product life compared to competing designs