Stock Air Box Vs. Injen

Mook

Member
:
Mazdaspeed Protege
I Received an Injen short ram intake or cold air i cant remember right now (its red with a K&N filter) with my car when i bought it, but the stock air box is installed right now with a fram filter.
I have seen many of these aftermarket intakes show increases, but i have also seen some of them just suck hot air from the engine compartment.

any experience on this, which one would be better for daily drivability?
 

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