Best K-Frame for improved handling?

Does anyone have any video footage of their car going around a race track with the alterktion put in?

I would like to see a company put a car around the track with the best available stock suspension components, than the same model car same engine with the best suspension they can put in. XV do the closest to this on their dvd but it shows it through only a few corners, I'd like to see a whole lap with times and hard evidence to see how much of an improvement there is.