I've decided to go twin 46mm wastegates and will have a new wastegate inlet tube fabricated in the front of my manifold, what spring should I run if I only plan on running 20psi? I was thinking 15psi spring? can you send me pics of your dual setup? thanksYou've got room off the front if you need it. You won't want to go too big on the wastegate as that makes it harder to control boost up top. A 60mm is a bad idea. I'd try a single (Tial 46mm would be my choice) and see how it goes. Then add a second one if needed. I'll send you a picture of mine for reference.