I wrapped mine. I used the thin header wrap, about 1" wide and the special paint stuff to seal it. I first took th eturbo housing down to bare metal then gave it quite a few coats of the paint, then wrapped it and coated the wrap with a bunch more light coats. The wrap hasn't budged ( and I had to manhandle the thing quite a bit when I stuffed that engine, because I had a clearance issue due to bad cab mounts, and it took a bit to figure that out. )
----------Robert