I have nothing to add to this, but the other day I was walking by a Vanagon, and noticed the huge front rotors and large calipers. My interest was instantly piqued, so I gave the bus a once-over. Turns out it has a Chevy LS 5.3 liter V8! The exhaust was pretty big, so I looked underneath it, and sure enough, there was a V8 crammed in there! I bet it really perked that thing up.