Review on Spectre Engine Air Filter SPE-HPR10464: High Performance Premium Washable Replacement Filter for 2006-2014 BMW 128i, 328i, 328i xDrive, 325i, 330i, 130i, 328xi, 325Xi, 330Xi by Mike Ogunlana

Fits 06 BMW 325xi N52 engine. the quality is the same as the k&n filter. I removed the carbon filter in my airbox and it really helped the engine breathe better. Also, I'm cheap, so I can use the filter over and over again. After cleaning, make sure it's dry and don't oil it or you could ruin the MAF sensor. Lots of information about cleaning/charging on the Internet and on YouTube. 1 more thing I won't buy with all the hype about the extra horsepower. from an air filter for $22. If you need HP, then buy Benz SLS or Shelby Cobra.