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You'll see very minimal gains with any air box related mod. I do have the AA filter, and noticed the car sounded as if it was breathing a bit better - the induction noise at 3200rpm was 15% louder.
As for the RPI scoops that I put in, I just like the look of a little red in the nostrils. I'm not sure if it does anything, there is a pretty strong crowd on both ends of that debate.
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M3.E90 JZB Coded.GTSDCT.BomizValved.TurnerTestPipes.ResDelete .EurochargedTune.AAFilter.HRER40s
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