I'm not sure if the gas volvo would have the same turbine wheel as the diesel does, but if it would swap on that would be nice, as I'm guessing it has the internal waste gate. As for the T4 compressor, its still not going to fit on the T3 turbine wheel and shaft, it wont be long enough. The T4 wheel is thicker than the T3, you wont have any threads sticking out to get the nut on.
Jason
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