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Others prevent max power from being produced like EGR valves

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I call BS on that one, an EGR cools cylinder temp therefore making an engine run more cleaner and more efficient. Producing more power. As far as a charcoal cannister and the smog pump, they pull an engine down. Ditch them if ya can.

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EGR cools down the combustion chamber temps, thereby lowering nox output. This has the same effect as lowering the compression ratio, ie cooler combustion chamber temps. Cooler combustion chamber temps = less power/efficiency, plain and simple.

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Ahh.....EGR does lower comb. temps which do indeed lower NOX emissions. However it also allows one to add more timing before spark knock(ping) occurs,which is a major contributor to Nox emissions! More spark lead more power,better fuel economy!!!Plain and simple!!
There is a lot of misconception around EGR systems,I see it on forums all the time.Just like I see about PCV systems!! I'm not saying it is needed,but a properly functioning system will not hurt engine performance! By the way, I'm an ASE certified tech(including L1,advanced drivability)and an Auto Instructor at a tech college.