that is such a hard question to answer, [whos got the most hp on there banshee]if i had to guess i would say that 4cylinder monster yfzdunejumper has.......but hell how about if we brake that question into classes
350 stock cyl and on......for me is not about horse power but how fast you can get from the beginning of the hill to the end,as is to everyone else that drag races......am sure dyno numbers matter to people like matt shearer when his building/making designing his pipes.the only way dyno horse power would matter to me is, if a motor like mine[bore/stroke]would be putting out more horse power than mine being there both on the same dyno.....the only time i saw that busa run was at dummont like 4 or 5 years ago and that thing was pulling 93miles an hour[pretty fast bitch if you ask me].....it was running good that day, now does that translate to 450hp to 93 miles an hour?probably not..i've heard[not seen]of a dmx doing that at sand mountain..am sure the dmx didnt have 450 hp to the rear wheels.