Need some help on naming some parts

UM so i been trying to find out what the name of these parts for about three weeks please help thanks




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get a header and a webber and throw all that bull shit in the garbage, plus youll almost get 30mpg if not more on some occasions

its a check valve, jus some bullshit mazda wang chung engineers built so americans would ask questions!

Not everyone can just junk that stuff some have emmsions testing that have to be passed