Hmmm, yeah maybe. It does look like the internally wastegated variants of the HX series do only bleed off one scroll though(from what I can tell from these pics: http://www.sxoc.com/vbb/showthread.php?t=363160) Maybe you'll get away from only wastegating only one collector, especially as the 6pots they're originally run on have less power overlap and more gas flow but from doing a little more research, it does seem to be more efficient using twin wastegates, more money and space required though![]()