Comparison pictures of the stock Cobb Sri filter and the aftermarket Amsoil Ea dry filter.
For a full review of the Amsoil filter check here
http://www.mazdas247.com/forum/showthread.php?t=123726397
For a full review of the Amsoil filter check here
http://www.mazdas247.com/forum/showthread.php?t=123726397