Quote:
Originally Posted by SoCalMP5
They can flow a certain amount of air for a given RPM, and I don't think you're asking them to flow anywhere near their limits yet. It's at THAT point where those parts become beneficial.
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THIS is nailing the nail on the head and a clear explanation. as a hypermiler you keep your engine at lower RPM and throttle position and thus aren't flowing as much volume intake/exhaust. That's not to say that there ISN'T any benefit to modifying these parts, just that the return benefit is going to be less than one might expect. Unless your down to splitting hairs, there are better places to invest your time/money.
best of luck!