Obviously this is generalized to make the diagram easier to read. You could go faster or slower with/without certain mods. Also, the prices (written vertically in gray) are not a complete price to reach that level - just the cost of some of the main parts necessary. Take notice of the huge amount of "Bang for the Buck" you can get with cheap bolt-ons on a stock motor, stock turbo truck! Beyond that point, it costs WAY more to only go a little bit faster. For more information on choosing correctly matching parts for a solid combination, check out this page: Syclone Modification Stages.