Ok I’ll try explaining this a different way. Probably using this site for and example 80% of the guys on here have heads flowing 300cfm or less. Now I’ll ask you a question. If you put a Wilson ported 2000.00 for porting alone intake on those 300cfm heads what are the heads going to flow with the intake bolted on??? And trust me I know flow isn’t everything but a perfectly ported intake can not correct a poorly ported head.