well.. the Si is fuel injected.. so it is most obvious
the DX has a higher redline than the HF (HF is 5500--look at tachometer)
the DX is 12V with 4 aux CVCC valves, the HF is 8V with 4 aux CVCC valves.
the HF has only 1 side-view mirror (driver's side), 2.5mph bumpers, a plastic cam cover, aluminum finned rear drums, and to say the exhaust pipe is a pea shooter would imply that you could actually fit a pea in there
