inducer is 37mm so very close to the vw k24 37.5mm, so very similar flow potential as far as max power. the exducer is smaller tho, which generally means its not as efficient for higher boost, but 55mm is still a good size and not that much smaller, depending on the design of the fins it could actually be better than the k24. k24 has a much larger turbine but depending on the design and the turbine housing a/r what u have could be faster spooling and better flowing. over all, i would say its a similar turbo, not much of an upgrade if it even is one.