Re: Pentastar aftermarket bolt-on intake
Neither an intake nor manifold will do anything for the valves, it will only provide more air. However the computer will adjust for the extra air, and dump more fuel, so you'll get more hp but not more mpg. There's usually also a gauranteed trade off in reliablity and engine life which is why you run into warranty issues. There's a trade off on pretty much all mods like that.
The stock intake is pretty well engineered on all cars these days. If there was a way for them to squeeze more hp and mpgs out of an engine and still offer 100K mile powertrain warranty, they would have done it by now.