I am currently running a MP61 with a .68 exhaust on a xs power t4 manifold with a 50mm hks knock off. The wastegate is supposed to have a 10psi spring but I can only hit 7psi. I've been told the knock off hks usually leaks so I need to know what wastegate to replace it with. Is it possible to bolt on a tial f41 wastegate to my 50mm hks flange?