Tial V44 External Wastegate with V-band inlet & outlet. The housing is made from 347SS alloy and the valve itself is made from high-temp NiCrFe based alloy. Actuated by a silicone Nomex reinforced diaphragm and the spring is also designed for durability out of 17-7 PH stainless steel giving consistent pressure even at high temperatures. Nitronic 60 Stainless Steel is used for the valve seat and valve bushing.