Nah, they don't make any difference who needs a heat riser.
General Motors only puts a factory heat riser system in their
engines because the engineers got bored and had to have
something to do. Keeps the guys on the production lines busy
also, other wise they would be just siting around drinking
coffee.
They should have gone to the school of hard knocks where those
mechanics went, just think of all that money they could be
saving the stock holders.
dg
