The 7001 wastegate features an investment cast body made from 253MA chromium-nickel stainless steel, a one-piece stainless steel valve, and a nomex reinforced diaphragm to cope with the extreme conditions and harsh environment of high-boost and exhaust temperatures. ? 50MM VALVE, ? V-BAND INLET AND OUTLET, ? 133MM OVERALL HEIGHT, ? SUPPLIED WITH 13PSI (OUTER) SPRING, ? ADDITIONAL SPRINGS AVAILABLE ARE 7PSI (INNER) AND 9PSI (MIDDLE), ? COMBINE SPRINGS TO ACHIEVE BASE BOOST PRESSURES OF 7, 9, 13, 16, 20, 22 AND 29PSI,