The first thing is to detemine the frame or family i.e. T4 or T6 inlet
Start by measuring the turbine inlet flange. The T4 will have a bolt centerline distance of 2.75 x 3.25. The T6 flange will measure 2.75 x 4.40.
The next best thing is to remove the compressor and turbine housings and use a pair of digital calipers to measure to the tip to tip dimensions of the smaller end (inducer) and larger end (exducer) of the blades on the wheels.
You can then start to determine what it is and also take a visual inspection of it's condition. IT's a good time to check the endplay (thrust bearing) for wear etc. Let us know what you come up with and some pictures and we should get you in the ballpark.
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Dennis
Moore Racecraft
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