PPE use these high-quality TiAL wastegates in our dual turbocharger system, but they can also be purchased individually for those who are building custom turbocharger applications. They are made from a combination of 347 Stainless Steel (housing) and a high temp NiCrFe based alloy (valve). These units feature a silicone Nomex reinforced diaphragm. For those running in extreme conditions, these units can be water-cooled using supplied fittings. Ultra-compact at only 4.17 inches tall, they come with all necessary flanges and clamps.