So long as it's the std .60 AR compressor housing as used on the cossies yes, the restrictor (34mm) is a tube like device that goes inside the main inlet, and is held by bolts going through the flange that secures the normal pipe, this then extends out about 2 1/2" and the pipe then goes on this bit, but yes restrictors are removable just a few bolts, normally three.
The 34mm restrictors are used in certain racing classes but are certainly not a limit till well over 300bhp anyway.
tabetha