I have had a pipercross air filter panel type for approx 6mths and a remap from premier tuning on my 09 2.2 diesel civic,as for remap the car is, in myopinion faster more economical runs nicer it was put in by fahad very nice guy ,but the filter seems to make no difference at all, i have swapped it around with new civic filter and can see no difference, also i think when cleaning filter you have to be carefull not to put o much fluid on it , not sure about this though, any advice appreciated