38mm Wastegate. These are a high quality copy of the Tial 38mm, and they look very nice. Many aftermarket manifolds use the 2 bolt 38mm flange. We offer these in 3 spring pressures, 8psi, 12psi, and 16psi.
Keep in mind that you can go up to 3X the spring pressure with an electronic boost controller. So a 8psi spring wastegate would give a maximum boost of about 24psi. You can not run lower boost pressure then the spring pressure though, so a 16psi wastegate can't boost lower then 16psi.