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I can testify to the Pod air filter. I just put on a six inch cone filter that had a 76mm inlet, needed to work it a little to get it to fit he 80mm inlet but wasn't too hard. As mentioned in another post I took the advice and left off the bottom of the air box. It took well under 10 minutes and the note is dramatically lower than before and louder even with stock exhaust. Picked up the pod filter for under $30.00 cheapest mod ever and a must do. Only draw back is car now sounds fasters than what it is.
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 E90 320i 07 Exec | innovations package | comfort access | 18" ellipsoid 162 | Yokohama 225/40 front 255/35 rear |