compared to my last rs turbo that had the cvh, there is just no comparison. My mate now owns my old car. took him a run in mine and he was gob smacked. pulls so much stronger, quieter and smoother. i'm running 7 psi on ofab without a chip where as he is running 16 psi etc and he reckons mine is quicker. I wouldnt even hesitate about building another if the need arises. best £1400 i ever spent.