Here is a nice pic of a 15G built from a new 13G turbo.



Here is a pic of a LMI "1600"... which is a 15G turbo.



Notice the difference in the clearance between the compressor wheel and the compressor cover. The LMI turbos have to have atleast 10x's the amount of clearance as the properly built 15G turbo. Now I see why these turbos don't make the power that they are supposed to.