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if you leave it exposed in the engine bay its a HAI (hot air intake) The FWI will draw COOLER air then exposed like mine shows....
on a NA car it wont make THAT much of a difference, both will be better than the stock box, if you're FI, cooler air will help control KR...
 

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Pcm

PCM is Pulse Code Module. Your computer basically.
 
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