CT12 (1G) Compressor Wheel: 
Click here for pic
CT12A (1J) Compressor Wheel:
	
	
	
		
		
		
			
		
		
	
	
		
	
 
Side by Side:
http://www.toymods.org.au/1G_vs_1JZ/images/1J & 1G Compressor Wheels.jpg
	
	
	
		
		
		
		
	
	
		
	
 
here are the sizes:
1G turbine inlet = 25mm
1J turbine inlet = 30mm
1G turbine exhaust outlet = 42mm
1J turbine exhaust outlet = 44mm
1G compressor inlet = 31mm
1J compressor inlet = 38mm
1G compressor outlet (to intake manifold) = 29mm
1J compressor outlet (to intake manifold) = 29mm
		
	
	
	
	
		
		
		
		
	
	
		
	
			
			Click here for pic
CT12A (1J) Compressor Wheel:
	Side by Side:
http://www.toymods.org.au/1G_vs_1JZ/images/1J & 1G Compressor Wheels.jpg
	here are the sizes:
1G turbine inlet = 25mm
1J turbine inlet = 30mm
1G turbine exhaust outlet = 42mm
1J turbine exhaust outlet = 44mm
1G compressor inlet = 31mm
1J compressor inlet = 38mm
1G compressor outlet (to intake manifold) = 29mm
1J compressor outlet (to intake manifold) = 29mm