That is a tough one. You can tell by the color of the aluminum parts or by how shiny the plastic is.
As said above.i've notice that all the plastic parts of the clone baja's are very shiny
as for the hpi plastic part's are more like a flat black
hope this help's
It's hard to tell without having the two side by side. The clone parts have more of a pronounced mold release line. The HPI plastics don't have much of the mold lines, if any. The glossiness of the two is pretty much the same these days.how do you tell if the plastic is the hpi ? because i want to buy a whole built front end ?