for anyone who thinks of it look at it this way a n/a engine sucks air into the engine. So the better the flow the more air sucked in. Your maf is there to measure the amount of air coming in and to adjust the spray of the fuel injectors accordingly. So to a certain extentyour car will read the more and air and supply more fuel to the standards set by the company.I think it's safe to say you can not lean out a good working condition engine by adding a tb/plenum kit since our engines are fuel injected and controlled by computers but i could be wrong because this is just on my own experience. I don't see any way you could buy one so free flowing to make your engine ping or to lean it out enough as say 30% just my .02 on the worries of leaning out please feel free to correct me if i'm wrong.
