Just been taking some photos of a couple of my turbos as a pretty cool size comparison...

The one turbo is pretty identical in size to a RS500 T4, exact on the compressor housing, though a bigger exhaust housing than a RS500 turbo, but all in all, within a few mm of RS500 T4 size.
So in all intents and purposes, a big ass 550bhp turbo.

The other one, well, is a mite bigger...








(pls ignore the slight oxidisation on the turbine housing of the bigger one, was left in a damp garage for a while, its still unused as yet)