[donv]

A supercharger is not all that subtle, if you've got one it would be fairly easy to spot on the engine I would think. Same thing for a turbo. If you can't tell from a quick inspection through the engine hatch yourself, take a photo and post it here and someone on the forum should be able to spot either.

If I were the prior owner and had made significant speed-enhancing mods like this, I think I would have let you know before the sale - and asked for some more $$$$ as a result!