Looking to buy a dump pipe for my tial 38mm wastegate. I see 35mm inlet and 38mm outlet tubes, which are said to be good for 38/35mm wastegates. Is this true? or do I need a 38mm inlet? (1.5") I was thinking of just buying a flange and fabricating one myself as I don't have too much room for the dump pipe to turn down. any help would be appreciated.