wastegates. All TiAL wastegate springs are constructed from 17-7 PH Stainless Steel which
is capable of maintaining consistent pressures up to 900 Deg F (483 Deg C). Please see
the information below to decide which spring(s) you need for your application. The boost
pressures are approximations from TiAL based on equal intake and exhaust manifold
pressures, results will vary slightly for different applications. Higher pressure settings will
require the use of both small and large diameter springs working together. In these dual
spring setups the resultant pressure is equal to the sum of the individual springs.