initially, notchtops are more expensive, but i don't see how its more expensive to upgrade. with the exception of my intake cam and intake plenum, just about everything else i have gotten would work on either engine.Blown240sx wrote:if your looking to upgrade later stick with the blacktop or redtop. The notch tops have good power from the start but cost much more to upgrade.
Also do a search many people before you have asked this question.