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Hey guys, I just installed the Perrin Stage 1 map onto my ECU with the AP and was reading that you can only use the stock air filter or else you may run rich and not get the best performance. Now 3 questions, will an CAI screw up my performance? and 2nd if I stick with the stock air filter can I put a new drop in filter in there? The 3rd question is, I removed the black air dam that goes to the filter box. Does anyone know If that harms your performance at all? Sorry for the plethora of questions!
 

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You would need a map tuned for the cold air intake, drop in filter is fine i'm using K&N you dont need to tune for this and gives you a tiny bit more power and sound. As for the part of the box you removed the only thing i would say it make sure you wont be sucking in water.
 
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