Swapping a 63mm wheel into a S478

JD3020

New member
Joined
May 12, 2011
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384
Newb question here.

I've got a S478/92 and i'm planning on selling/trading the compressor wheel for a 63mm wheel to be 2.5 legal. Since the 78mm wheel has a huge exducer do i have to swap the the backing plate as well? Or will the small wheel work fine with the gap on the backing plate?
 
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