Intake system

Hi, i have a Mazda Protege ES 2000, and i dont know install the Intake system, because in the store said me that it cant install it by the O2 sensor, is that true, sorry for my english, Im from Guatemala city.
 
if you have an intake, it in no way messes with your 02 sensor. Maybe they meant the MAF, but its not a big deal. what brand did you get, ill see if i can find you some instructions
 
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