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+1 for PE first, sounds incredible! It doesn't add much for power but with NA engine it does get a lot zippier and more responsive in low gears, PI does the same thing for the car at highway speed, it just guzzles air! If cost is a factor AFE is probably your best bet or doing a euro filter mod. Also if you haven't done a carbon filter delete you should give it a shot
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2015 Cosmic Blue Metallic Wrapped X3 35i ///M Sport
Full 3M Vinyl Wrap | Flat Black Grilles
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