The GFB 10 psi outer wastegate spring for EX38/44 wastegates is an application-specific spring listed as the outer 10psi component. As described in the product fields, this spring is intended for use with EX38/44 wastegate assemblies to provide the 10 psi spring rate specified, and is identified as the outer spring in the extended description.
GFB EX38/44 10psi Wastegate Spring (Outer)