Tial 38mm MVS 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 hardware. - Mating weld flanges are 304L - Color anodized aluminum actuator (Silver, Red, Blue, Purple, Black). - 3 lower ports and two top ports for easy install, no need to rotate the actuator top at all, plugs included for unused ports. -Ultra compact design fits in very tight spaces, the unit stands only 3.7" tall, more compact than any other external wastegate on the market today. - V-Band inlet and outlet make install easy, flanges and clamps are in the box!