Does anyone know what wg spring ratings are out there? SJM only has a 1.5 and 1.8 bar spring. It would be nice to find a source for 1.6 bar or something between...Also is there any difference between KH and MC wastegates or wg springs? I was told you can adjust the value, how is this done...does it really work properly? Thanks much. -ameer '84 5kT