This was my uncle’s car. He is retired from racing being 70+ now. The insanity starts at 1:19. You can also attach a leaf blower to the under tray to create a vacuum. SCCA baned that little trick pretty quickly. The car is powered by a 3-cylinder yamaha (I think) turbo’d snowmobile engine, and has a centrifugal clutch (I think that’s what you call it - like a cvt) set for red line at about 90 mph.