Stage 1
STD EXHAUST HOUSING, LARGER COMPRESSOR WHEEL, UPRATED THRUST BEARING (NOT 360 deg) -31 ACTUATOR

Stage 2
STD EXHAUST HOUSING, LARGER COMPRESSOR WHEEL, 360 deg THRUST BEARING, -31 ACTUATOR

Stage 3
LARGER EXHAUST HOUSING, LARGER COMPRESSOR WHEEL, 360 deg THRUST BEARING, -31 ACTUATOR