wheel for a .42 A/R Garrett compressor housing
 

How big a wheel can I put in a garrett .42 A/R compressor housing?

Thanks

T3 compressor wheels
 

If we are looking at standard wheels for applications with .42 A/R compressor housing, this would be a T3 compressor housing and you would be looking I believe at the 409096-XXXX range of compressor wheels.

The biggest one I know of is the 409096-0013 which has an inducer of 46mm (exducer 60mm as with all the wheels in this range) and a blade tip height of 5mm.