Hey Mandy, I have a MAC on my Cobra. Cost me $150 and they claim it adds 10-12 HP. I did notice a difference but all I have is seat-of -the-pants. BBK also makes a good one. You definately do not want to run an open filter element inside the engine compt. I tried it and it definitely hurt performance. Hope this helps...
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'97 Cobra, Rio Red, MAC Cold Air Kit, 3.73s, NGK V-Power
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